Trigonometric Parallaxes of Massive Star Forming Regions: VI. Galactic Structure, Fundamental Parameters and Non-Circular Motions

Abstract

We are using the VLBA and the Japanese VERA project to measure trigonometric parallaxes and proper motions of masers found in high-mass star-forming regions across the Milky Way. Early results from 18 sources locate several spiral arms. The Perseus spiral arm has a pitch angle of 16 +/- 3 degrees, which favors four rather than two spiral arms for the Galaxy. Combining positions, distances, proper motions, and radial velocities yields complete 3-dimensional kinematic information. We find that star forming regions on average are orbiting the Galaxy ~15 km/s slower than expected for circular orbits. By fitting the measurements to a model of the Galaxy, we estimate the distance to the Galactic center R_o = 8.4 +/- 0.6 kpc and a circular rotation speed Theta_o = 254 +/- 16 km/s. The ratio Theta_o/R_o can be determined to higher accuracy than either parameter individually, and we find it to be 30.3 +/- 0.9 km/s/kpc, in good agreement with the angular rotation rate determined from the proper motion of Sgr A*. The data favor a rotation curve for the Galaxy that is nearly flat or slightly rising with Galactocentric distance. Kinematic distances are generally too large, sometimes by factors greater than two; they can be brought into better agreement with the trigonometric parallaxes by increasing Theta_o/R_o from the IAU recommended value of 25.9 km/s/kpc to a value near 30 km/s/kpc. We offer a "revised" prescription for calculating kinematic distances and their uncertainties, as well as a new approach for defining Galactic coordinates. Finally, our estimates of Theta_o and To/R_o, when coupled with direct estimates of R_o, provide evidence that the rotation curve of the Milky Way is similar to that of the Andromeda galaxy, suggesting that the dark matter halos of these two dominant Local Group galaxy are comparably massive.

arXiv comment35 pages, 7 figures, 7 tables

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• JCMT HARP CO 3-2 Observations of Molecular Outflows in W5
• LUX likelihood and limits on spin-independent and spin-dependent WIMP couplings with LUXCalc
• Large-Scale Kinematics, Astrochemistry and Magnetic Field Studies of Massive Star-forming Regions through HC3N, HNC and C2H Mappings
• Preliminary bounds of the gravitational Local Position Invariance from Solar System planetary precessions
• Cygnus X-3: Its Little Friend's Counterpart, the Distance to Cygnus X-3, and Outflows/Jets
• Astrometric Microlensing by Local Dark Matter Subhalos
• Improved determination of the WIMP mass from direct detection data
• Identification of HESS J1303-631 as a Pulsar Wind Nebula through gamma-ray, X-ray and radio observations
• Ring-like features in directional dark matter detection
• First Parallax Measurements Towards a 6.7 GHz Methanol Maser with the Australian Long Baseline Array - Distance to G339.884-1.259
• Lifetime of short-period binaries measured from their Galactic kinematics
• A first measurement of the Proper Motion of the Leo II dwarf spheroidal galaxy
• Redetermination of Galactic Spiral Density Wave Parameters Based on Spectral Analysis of Maser Radial Velocities
• Swift J1727.8-1613 has the Largest Resolved Continuous Jet Ever Seen in an X-ray Binary
• A database of circumstellar OH masers
• The Protocluster G18.67+0.03: A Test Case for Class I Methanol Masers as Evolutionary Indicators for Massive Star Formation
• Models for the 3-D axisymmetric gravitational potential of the Milky Way Galaxy - A detailed modelling of the Galactic disk
• The asymmetric drift, the local standard of rest, and implications from RAVE data
• Massive stars in the Cl 1813-178 Cluster. An episode of massive star formation in the W33 complex
• Trigonometric Parallaxes of Massive Star-Forming Regions. IX. The Outer Arm in the First Quadrant
• Kinematics of classical Cepheids in the Nuclear Stellar Disk
• Astrometry of H${}_2$O masers in the massive star--forming region IRAS 06061+2151 with VERA
• Extremely broad radio recombination maser lines toward the high-velocity ionized jet in Cepheus A HW2
• A SiO J = 5 - 4 Survey Toward Massive Star Formation Regions
• Anomalous peculiar motions of high-mass young stars in the Scutum spiral arm
• The Myth of the Molecular Ring
• Rigorous treatment of barycentric stellar motion: Perspective and light-time effects in astrometric and radial velocity data
• Absolute proper motion of the Galactic open cluster M67
• NGC 7419 as a template for red supergiant clusters
• New Distance and Revised Natures of High Mass Star Formation in G5.89-0.39
• The non-monotonic, strong metallicity dependence of the wide-binary fraction
• A CoGeNT confirmation of the DAMA signal
• Testing modified Newtonian dynamics in the Milky Way
• A molecular line study of the filamentary infrared dark cloud G304.74+01.32
• On the connection of the apparent proper motion and the VLBI structure of compact radio sources
• Complementarity of direct and indirect Dark Matter detection experiments
• A third cluster of red supergiants in the vicinity of the massive cluster RSGC3
• A 1-mm spectral line survey toward GLIMPSE Extended Green Objects (EGOs)
• A Galactic Plane Defined by the Milky Way HII Region Distribution
• Initial Fragmentation in the Infrared Dark Cloud G28.53-0.25
• Dust scattering halo of 4U 1630-47 observed with Chandra and Swift: New constraints on the source distance
• Evidence for mass-dependent peculiar velocities in compact object binaries: Towards better constraints on natal kicks
• Closing in on mass-degenerate dark matter scenarios with antiprotons and direct detection
• Trigonometric Parallaxes of Star Forming Regions Beyond the Tangent Point of the Sagittarius Spiral Arm
• Nuclear uncertainties in the spin-dependent structure functions for direct dark matter detection
• Astrometry of Galactic Star-Forming Region Onsala 1 with VERA: Estimation of Angular Velocity of Galactic Rotation at Sun
• SEDIGISM-ATLASGAL: Dense Gas Fraction and Star Formation Efficiency Across the Galactic Disk
• 37 GHz methanol masers : Horsemen of the Apocalypse for the class II methanol maser phase?
• European VLBI Network imaging of 6.7 GHz methanol masers
• Synthetic CO, H2 and HI surveys of the Galactic 2nd Quadrant, and the properties of molecular gas
• Probing the Interstellar Dust towards the Galactic Centre: Dust Scattering Halo around AX J1745.6-2901
• APOGEE strings: a fossil record of the gas kinematic structure
• Physical Conditions of the Earliest Phases of Massive Star Formation: Single-Dish and Interferometric Observations of Ammonia and CCS in Infrared Dark Clouds
• Search for inelastic dark matter with the CDMS II experiment
• Tidally induced spiral arm wraps encoded in phase space
• Direct detection of WIMPs : Implications of a self-consistent truncated isothermal model of the Milky Way's dark matter halo
• The araucaria project. An accurate distance to the late-type double-lined eclipsing binary ogle smc113.3 4007 in the small magellanic cloud
• Mapping Outflowing Gas in the Fermi Bubbles: a UV Absorption Survey of the Galactic Nuclear Wind
• Local Stellar Kinematics and Oort Constants from the LAMOST A-type Stars
• The spiral structure in the Solar neighborhood
• Dynamical model of the Milky Way using APOGEE and Gaia data
• The Metal-Poor Stellar Halo in RAVE-TGAS and its Implications for the Velocity Distribution of Dark Matter
• Excited-state hydroxyl maser catalogue from the methanol multibeam survey -- I. Positions and Variability
• A Schwarzschild model of the Galactic bar with initial density from N-body simulations
• A 95 GHz Class I Methanol Maser Survey Toward A Sample of GLIMPSE Point Sources Associated with BGPS Clumps
• Into the Darkness: Classical and Type II Cepheids in the Zona Galactica Incognita
• Properties of the Compact HII Region Complex G-0.02-0.07
• Analysis of Determinations of the Distance between the Sun and the Galactic Center
• Constraining the pitch angle of the Galactic spiral arms in the Milky Way
• Galactic Rotation Curve and Spiral Density Wave Parameters from 73 Masers
• Evolution of dust and molecular hydrogen in the Magellanic System
• Discovery of Large-Scale Gravitational Infall in a Massive Protostellar Cluster
• A search for water masers associated with class II methanol masers - II. Longitude range 341${}^{\circ }$ to 6${}^{\circ }$
• Sagittarius stream 3-d kinematics from SDSS Stripe 82
• 12.2-GHz methanol maser MMB follow-up catalogue - II. Longitude range 186 to 330 degrees
• MALT-45: A 7 mm survey of the southern Galaxy - I. Techniques and spectral line data
• Stellar Velocity Dispersion and Anisotropy of the Milky Way Inner Halo
• Properties of massive star-forming clumps with infall motions
• Distance and Proper Motion Measurement of the Red Supergiant, PZ Cas, in Very Long Baseline Interferometry H2O Maser Astrometry
• Mass-scaling as a method to constrain outflows and particle acceleration from low-luminosity accreting black holes
• The 2014-2017 outburst of the young star ASASSN-13db: A time-resolved picture of a very low-mass star between EXors and FUors
• Solar WIMPs Unraveled: Experiments, astrophysical uncertainties, and interactive Tools
• The dynamical origin of the Local arm and the Sun's trapped orbit
• A Systemic Study of 14 Southern Infrared Dark Clouds with the N2H+, HNC, HCO+, and HCN Lines
• Testing Triggered Star Formation in Six H II Regions
• Statistical fractal analysis of 25 young star clusters
• The Herschel Exploitation of Local Galaxy Andromeda (HELGA). VI. The distribution and properties of molecular cloud associations in M31
• SiO maser emission from red supergiants across the Galaxy: I. Targets in massive star clusters
• The Large-scale ISM of SS433/W50 Revisited
• A double detached shell around a post-Red Supergiant:IRAS 17163-3907, the Fried Egg nebula
• Unveiling the main heating sources in the Cepheus A HW2 region
• Two Massive, Low-Luminosity Cores Toward Infrared Dark Clouds
• Radio Detection of A Candidate Neutron Star Associated with Galactic Center Supernova Remnant Sagittarius A East
• The accretion history of high-mass stars: An ArTéMiS pilot study of Infrared Dark Clouds
• Thermal balance and comparison of gas and dust properties of dense clumps in the Hi-GAL survey
• A large-scale survey of CO and its isotopologues toward the Rosette molecular cloud
• $\text{galkin}$: a new compilation of the Milky Way rotation curve data
• Proper motions and structural parameters of the Galactic globular cluster M71
• Parallaxes of 6.7-GHz Methanol Masers towards the G305.2 High-Mass Star Formation Region
• All-sky census of Galactic high-latitude molecular intermediate-velocity clouds
• A search for water masers associated with class II methanol masers - I. Longitude range 6 to 20 degrees
• Triggered/sequential star formation? A multi-phase ISM study around the prominent IRDC G18.93-0.03
• Isotropic at the Break? 3D Kinematics of Milky Way Halo Stars in the Foreground of M31
• Observations and three-dimensional ionization structure of the planetary nebula SuWt 2
• HI Observations of the Asymptotic Giant Branch Star X Herculis: Discovery of an Extended Circumstellar Wake Superposed on a Compact High-Velocity Cloud
• Chemical abundances in the protoplanetary disk LV2 (Orion): clues to the causes of the abundance anomaly in HII regions
• SNR G349.7+0.2: A gamma-ray source in the far 3 kpc arm of the Galactic center
• High velocity HI is not associated with TeV supernova remnant W51C
• A time-dependent jet model for the emission from Sagittarius A*
• Primordial He' abundance implied by the mirror dark matter interpretation of the DAMA/Libra signal
• The Galactic Magnetic Field's Effect in Star-Forming Region
• The Fan Region at 1.5 GHz. I: Polarized synchrotron emission extending beyond the Perseus Arm
• First metallicity determination from Near-Infrared spectra for five obscured Cepheids discovered in the inner Disk
• Resolving the Sub-AU-Scale Gas and Dust Distribution in FU Orionis Sources
• Clustering of Local Group distances: publication bias or correlated measurements? V. Galactic rotation constants
• An Outer Arm in the Second Galactic Quadrant: Structure
• The Three-mm Ultimate Mopra Milky Way Survey. II. Cloud and Star Formation Near the Filamentary Ministarburst RCW 106
• Exciting dark matter in the galactic center
• Near-infrared H2 and Continuum Survey of Extended Green Objects. II. Complete Census for the Northern Galactic Plane
• A resonant feature near the Perseus arm revealed by red clump stars
• Dark Matter in Astrophysics/Cosmology
• The Coalsack near and far
• Statistical Tests of Noise and Harmony in Dark Matter Modulation Signals
• Six Faint Gamma-ray Pulsars Seen with the Fermi Large Area Telescope -- Towards a Sample Blending into the Background
• The 21cm "Outer Arm" and the Outer-Galaxy High-Velocity Clouds: Connected by Kinematics, Metallicity, and Distance
• Galactic Kinematics from a Sample of Young Massive Stars
• Action-based Dynamical Modelling for the Milky Way Disk
• Fragmentation and Kinematics of dense molecular cores in the filamentary infrared-dark cloud G011.11-0.12
• Palomar/TripleSpec observations of {\it Spitzer}/MIPSGAL~24\mic\ circumstellar shells: unveiling the nature of their central sources
• Measurement of the solar system acceleration using the Earth scale factor
• EVN observations of 6.7 GHz methanol masers in clusters of massive young stellar objects
• Measurement of the Distance and Proper Motions of the H2O Masers in the Young Planetary Nebula K 3-35
• Revisiting the Role of M31 in the Dynamical History of the Magellanic Clouds
• Constraining the Solar Galactic Reflex Velocity Using Gaia Observations of the Sagittarius Stream
• Very wide companion fraction from Gaia DR2: a weak or no enhancement for hot jupiter hosts, and a strong enhancement for contact binaries
• Using classical Cepheids to study the far side of the Milky Way disk. II. The spiral structure in the first and fourth Galactic quadrants
• LABOCA 870 micron dust continuum mapping of selected infrared-dark cloud regions in the Galactic plane
• Gaia-DR2 extended kinematical maps. Part III: Rotation curves analysis, dark matter, and Modified Newtonian dynamics tests
• Characterization of Young Stellar Clusters
• Prospects of 3D mapping of the Galactic Centre clouds with X-ray polarimetry
• Massive Stars in the W33 Giant Molecular Complex
• Impact of distance determinations on Galactic structure. I. Young and intermediate-age tracers
• VdBH 222: a starburst cluster in the inner Milky Way
• Astrometry of Star Forming Region IRAS 05137+3919 in the far outer Galaxy
• Uniform detection of the pre-main sequence population in the 5 embedded clusters related to the H\,II region NGC\,2174 (Sh2-252)
• The local standard of rest from data on young objects with account for the Galactic spiral density wave
• Systematic uncertainties from halo asphericity in dark matter searches
• Accuracy Diagrams for the Galactic Rotation Curve and Kinematical Distances
• New infrared spectral indices of luminous cold stars: from early K to M-types
• Complementarity for Dark Sector Bound States
• Stellar Overdensity in the Local Arm in Gaia DR2
• HI Absorption Toward HII Regions at Small Galactic Longitudes
• The first "water fountain" collimated outflow in a planetary nebula
• Impact of a Pioneer/Rindler-type acceleration on the Oort cloud
• Using Interstellar Clouds to Search for Galactic PeVatrons: Gamma-ray Signatures from Supernova Remnants
• 12.2-GHz methanol maser MMB follow-up catalogue - III. Longitude range 10 to 20 degrees
• Cosmic ray transport and anisotropies
• Non-circular Motions in the Outer Perseus Spiral Arm
• Streaming Motions and Kinematic Distances to Molecular Clouds
• Aberrational Effects for Shadows of Black Holes
• Making sense of the local Galactic escape speed estimates in direct dark matter searches
• Incorporating Streams into Milky Way Models
• Gravitational lensing of massive particles by a black-bounce-Schwarzschild black hole
• MALT-45: A 7mm survey of the southern Galaxy - II. ATCA follow-up observations of 44GHz class I methanol masers
• A Galactic Ring of Minimum Stellar Density Near the Solar Orbit Radius
• On the ALMA observability of nascent massive multiple systems formed by gravitational instability
• The Gould Belt, the de Vaucouleurs-Dolidze Belt, and the Orion Arm
• Tightening the belt: Constraining the mass and evolution in SDC335
• Trigonometric Parallaxes of Four Star-forming Regions in the Distant Inner Galaxy
• Maser Observations of Westerlund 1 and Comprehensive Considerations on Maser Properties of Red Supergiants Associated with Massive Clusters
• Ammonia and CO Outflow around 6.7 GHz Methanol Masers
• Aberration features in directional dark matter detection
• Annual Parallax Distance and Secular Motion of the Water Fountain Source IRAS 18286-0959
• Milky Way Kinematics. II. A uniform inner Galaxy HI terminal velocity curve
• Discovery of weak 6.7-GHz CH3OH masers in a sample of high-mass Hi-GAL sources
• A NIKA view of two star-forming infrared dark clouds: Dust emissivity variations and mass concentration
• Diffuse interstellar bands in the HII region M17: Insights into their relation with the total-to-selective visual extinction $R_V$
• Meta-analysis from different tracers of the small Local Arm around the Sun - extent, shape, pitch, origin
• First results of an H-alpha based search of classical Be stars in the Perseus Arm and beyond
• Testing maser-based evolutionary schemes: A new search for 37.7-GHz methanol masers
• Clustered star formation at early evolutionary stages. Physical and chemical analysis of the young star-forming regions ISOSS J22478+6357 and ISOSS J23053+5953
• On the Accuracy of Three-dimensional Kinematic Distances
• VLA observations of water masers towards 6.7 GHz methanol maser sources
• Massive stars in the giant molecular cloud G23.3-0.3 and W41
• Detection of periodic variations in vertical velocities of Galactic masers
• Gamma-ray signatures of annihilation to charged leptons in dark matter substructure
• Electric Dipole Moment of Dirac Fermionic Dark Matter
• Kinematic study of the association Cyg OB3 with Gaia DR2
• Determination of Galactic Rotation Parameters and the Solar Galactocentric Distance Ro from 73 Masers
• Chasing a consistent picture for dark matter direct searches
• Robustness of dark matter constraints and interplay with collider searches for New Physics
• Reconsidering the galactic coordinate system
• Evidence for dark matter modulation in CoGeNT?
• Testing the Hypothesis that Methanol Maser Rings Trace Circumstellar Disks: High Resolution Near-IR and Mid-IR Imaging
• The Structure of Dark Molecular Gas in the Galaxy -- II. Physical State of "CO-Dark" Gas in the Perseus Arm
• The massive multiple system HD 64315
• The structure and kinematics of the the Galaxy thin gaseous disc outside the solar orbit
• The study of a system of H II regions toward l = 24.8 deg, b = 0.1 deg at the Galactic bar - Norma arm interface
• Kinematics of Red Variables in the Solar Neighborhood I. Basic Data Obtained by an SiO Maser Survey
• The Stellar Content of Obscured Galactic Giant HII Regions. VII. W3
• Astrophysical parameters and orbital solution of the peculiar X-ray transient IGR J00370+6122
• From the ashes: JVLA observations of water fountain nebula candidates show the rebirth of IRAS 18455+0448
• The Gould Belt
• Star Formation Sites toward the Galactic Center Region: The Correlation of CH3OH Masers, H2O Masers, and Near-IR Green Sources
• G10.472+0.027: An Extreme water maser outflow associated with a Massive Protostellar Cluster
• Estimation of the SolarGalactocentric Distance and Rotation Velocity from Near-Solar-Circle Objects
• Modelling ripples in Orion with coupled dust dynamics and radiative transfer
• Sensitive CO and 13CO survey of water fountain stars. Detections towards IRAS 18460-0151 and IRAS 18596+0315
• Embedded star clusters as sources of high-energy cosmic rays: Modelling and constraints
• Action-based Dynamical Modeling for the Milky Way Disk: The Influence of Spiral Arms
• Outer Rotation Curve of the Galaxy with VERA II: Annual Parallax and Proper Motion of the Star-Forming Region IRAS21379+5106
• Star Formation Activity in the Long, Filamentary Infrared Dark Cloud G53.2
• The evolution of the H2O maser emission in the accretion burst source G358.93-0.03
• Molecular cloud distance determination from deep NIR survey extinction measurements
• Physical properties, kinetics and mass function of 12 northern infrared dark clouds
• Chemical abundances in Orion protoplanetary discs: integral field spectroscopy and photoevaporation models of HST 10
• Stars with fast Galactic rotation observed in Gaia TGAS: a signature driven by the Perseus arm?
• Observations of three young gamma-ray pulsars with the Gran Telescopio Canarias
• Offsets of masers with respect to the middle of the Perseus arm, and the co-rotation radius in the Milky Way
• Constraining the Milky Way Dark Matter Density Profile with Gamma-Rays with Fermi-LAT
• ATCA survey of water masers in the Large Magellanic Cloud
• Stromgren photometric survey in the Galactic anticenter direction
• CO Outflow Candidates Toward the W3/4/5 Complex I: The Sample and its Spatial Distribution
• Beyond the Solar Circle $-$ Trends in Massive Star Formation Between the Inner and Outer Galaxy
• Spectroscopy of Dwarf Stars Around the North Celestial Pole
• CO J=3-2 Emission from the "Water Fountain" Sources IRAS 16342-3814 and IRAS 18286-0959
• Near-Solar-Circle Method for Determination of the Galactic Constants
• G048.66-0.29: Physical State of an Isolated Site of Massive Star Formation
• Intermittent maser flare around the high mass young stellar object G353.273+0.641 I: data & overview
• Lowering the Threshold in the DAMA Dark Matter Search
• The KCAL VERA 22 GHz calibrator survey
• Distance of PSR B0458+46 indicated by FAST HI absorption observations
• Properties of Galactic Dark Matter: Constraints from Astronomical Observations
• Distance and proper motion measurement of water masers in Shapless 269 IRS 2w
• MOND orbits in the Oort cloud
• Improved Measurements of Molecular Cloud Distances Based on Global Search
• The embedded cluster or association Trumpler 37 in IC1396: a search for evolutionary constraints
• Interstellar extinction, polarization, and grain alignment in the Sh 2-185 (IC 59 and IC 63) region
• Vertical Structure and Kinematics of the Galactic Outer Disk
• A Solar System Test of Self-Interacting Dark Matter
• Astrometric Detection of Intermediate-Mass Black Holes At the Galactic Centre
• Deep VLA Images of the HH 124 IRS Radio Cluster and its Surroundings and a New Determination of the Distance to NGC 2264
• CEN34 -- High-Mass YSO in M17 or Background Post-AGB Star?
• Geometric Aspects and Testing of the Galactic Center Distance Determination from Spiral Arm Segments
• Kinematic and Thermal Structure at the onset of high-mass star formation
• The velocity distribution in the solar neighbourhood from the LAMOST pilot survey
• Physical Properties of Galactic Planck Cold Cores revealed by the Hi-GAL survey
• Magnetic Field Structures in Star Forming Regions: Mid-Infrared Imaging Polarimetry of K3-50
• On the massive young stellar object AFGL4176: High-spatial-resolution multi-wavelength observations and modeling
• NGC 3105: a young open cluster with low metallicity
• Simulated Galactic methanol maser distribution to constrain Milky Way parameters
• Aberration in proper motions for stars in our Galaxy
• Probing the early phases of high mass star formation with 6.7 GHz methanol masers
• Testing Weyl Gravity at Galactic and Extra-galactic Scales
• VLBI Observations of H2O Maser Annual Parallax and Proper Motion in IRAS 20143+3634: Reflection on the Galactic Constants
• Absolute Proper Motion of IRAS 00259+5625 with VERA : Indication of Superbubble Expansion Motion
• Chemical abundances in the protoplanetary disk LV2 (Orion) - II: High dispersion VLT observations and microjet properties
• Uncovering the Invisible: A Study of Gaia18ajz, a Candidate Black Hole Revealed by Microlensing
• On the Diagnostic Power of FIR/Sub-mm SED Fitting in Massive Galactic Molecular Clumps
• Herschel HIFI Observations of the Sgr A +50 km/s Cloud. Deep Searches for O2 in Emission and Foreground Absorption
• The peculiar chemical abundance of the transitional millisecond pulsar PSR J1023+0038 -- Li enhancement
• Testing the star formation scaling relations in the clumps of the North American and Pelican cloud complexes
• Inverse Multview I: Multi-Calibrator inverse phase referencing for Microarcsecond VLBI Astrometry
• The Runaway Binary LP 400-22 is Leaving the Galaxy
• Discovery of four water masers in the Small Magellanic Cloud
• Weather Forecast of the Milky Way: Shear and Stellar feedback determine the lives of Galactic-scale filaments
• Singularities in the Gravitational Capture of Dark Matter through Long-Range Interactions
• Galacto-forensic of LMC's orbital history as a probe for the dark matter potential in the outskirt of the Galaxy
• Probing the initial conditions of high-mass star formation -- IV. Gas dynamics and NH${}_2$D chemistry in high-mass precluster and protocluster clumps
• Uncovering distinct environments in an extended physical system around the W33 complex
• The Origin of HVS17, an Unbound Main Sequence B Star at 50 kpc
• New Constraints on Cosmic Particle Populations at the Galactic Center using X-ray Observations of the Molecular Cloud Sagittarius B2
• Photometric distances to young stars in the inner Galactic disk. I. The L = 314${}^o$ direction
• Parallax-based Distances to Galactic Hii Regions: Nearby Spiral Structure
• Molecular Clouds: Internal Properties, Turbulence, Star Formation and Feedback
• ALMA Compact Array observations of the Fried Egg nebula: Evidence for large-scale asymmetric mass-loss from the yellow hypergiant IRAS 17163-3907
• Neutrinos from WIMP annihilation in the Sun : Implications of a self-consistent model of the Milky Way's dark matter halo
• SiO Outflows in the Most Luminous and Massive Protostellar Sources of the Southern Sky
• A CO survey on a sample of Herschel cold clumps
• Leading-order deflection of particles by a moving Schwarzschild lens with a two-dimensional velocity
• Spectroscopic confirmation of the low-latitude object FSR 1716 as an old globular cluster
• Trigonometric Parallax of IRAS 22555+6213 with VERA: 3-Dimensional View of Sources Along the Same Line of Sight
• Spatial and velocity offsets of Galactic masers from the centers of spiral arms
• The RMS Survey: Ammonia mapping of the environment of young massive stellar objects II
• Comparing Observed Stellar Kinematics and Surface Densities in a Low Latitude Bulge Field to Galactic Population Synthesis Models
• Census of High- and Medium-mass Protostars V. CO Abundance and the Galactic $X_{\text{CO}}$ Factor
• The ionization fraction in OMC-2 and OMC-3
• Inverse MultiView II: Microarcsecond Trigonometric Parallaxes for Southern Hemisphere 6.7~GHz Methanol Masers G232.62+00.99 and G323.74$-$00.26
• Formaldehyde Densitometry of Galactic Star-Forming Regions Using the H2CO 3(12)-3(13) and 4(13)-4(14) Transitions
• Probing the initial conditions of high-mass star formation. III. Fragmentation and triggered star formation
• Observations of the $\gamma$-ray pulsar J1932+1916 in X-rays
• The application of MultiView Methods for High Precision Astrometric Space VLBI at Low Frequencies
• Investigations of the Class I methanol masers in NGC 4945
• Interstellar scintillation is an indicator of astrometric stability
• Corrections for the Lutz-Kelker Bias for Galactic Masers
• Parameters of the Link between the Optical and Radio Frames from Gaia DR2 Data and VLBI Measurements
• Analysis of H2O Masers in Sharpless 269 using VERA Archival data --- Effect of maser structures on astrometric accuracy
• New classical Cepheids in the inner part of the northern Galactic disk and their kinematics
• Distribution of Water Vapor in Molecular Clouds. II
• Deep into the Water Fountains: The case of IRAS 18043-2116
• Analysis of Galactic Rotation from Masers based on a Nonlinear Oort Model
• Kinematic Distance of Galactic Planetary Nebulae
• Disentangling Confused Stars at the Galactic Center with Long Baseline Infrared Interferometry
• Deuteration in infrared dark clouds
• The Effect of Light Deflection by Solar System Objects on High-Precision SKA Astrometry
• Galactic Sun's motion in the Cold Dark Matter, MOdified Newtonian Dynamics and MOdified Gravity scenarios
• The onset of stellar multiplicity in massive star formation: A search for low-mass companions of massive young stellar objects with $L^{\prime }$-band adaptive optics imaging
• Orientation effect on the ligh curve shape of periodic methanol maser sources
• Gas kinematics in massive star-forming regions from the Perseus spiral arm
• Anthropic constraints on the cosmological constant from Sun's motion through the Milky Way
• The Seahorse Nebula: New views of the filamentary infrared dark cloud G304.74+01.32 from SABOCA, Herschel, and WISE
• Multiwavelength study of low-luminosity 6.7-GHz methanol masers
• Early Science with the Large Millimetre Telescope: Fragmentation of molecular clumps in the Galaxy
• Measuring the Sun's Motion with Stellar Streams
• The nearby Galaxy structure toward the Vela Gum nebula
• Interarm islands in the Milky Way -- the one near the Cygnus spiral arm
• Investigating the nature of the Fried Egg nebula: CO mm-line and optical spectroscopy of IRAS 17163-3907
• Neutrinos from Off-Shell Final States and the Indirect Detection of Dark Matter
• The ALMA Survey of 70 $\mu$m Dark High-mass Clumps in Early Stages (ASHES). XII. Unanchored Forked Stream in the Propagating Path of a Protostellar Outflow
• Prospects for the polarimetric mapping of the Sgr A molecular cloud complex with IXPE
• Outer rotation curve of the Galaxy with VERA IV: Astrometry of IRAS 01123+6430 and the possibility of cloud-cloud collision
• Stellar Populations in the Galactic Center
• The Expanding 3 kpc Arms Are Neither Expanding nor Spiral Arms but X1 Orbits Driven by the Galactic Bar
• Spitzer Mid-infrared Study of Sh 2-208: Evolution of Protoplanetary Disks in Low-metallicity Environments
• Radial velocity and chemical composition of evolved stars in the open clusters NGC 6940 and Tombaugh 5
• The Milky Way thin disk structure as revealed by stars and young open clusters
• Milliarcsecond structure of water maser emission in two young high-mass stellar objects associated with methanol masers
• Unveiling the initial conditions of open star cluster formation
• Detections of massive stars in the cluster MCM2005b77, in the star-forming regions GRS G331.34$-$00.36 (S62) and GRS G337.92$-$00.48 (S36)
• Solar system constraints on planetary Coriolis-type effects induced by rotation of distant masses
• The Kinetic Sunyaev-Zel'dovich effect of the Milky Way Halo
• A Primeval Magellanic Stream and Others
• Autonomous Gaussian decomposition of the Galactic Ring Survey. II. The Galactic distribution of 13CO
• Binary Formation in a 100 $\mu$m-dark Massive Core
• Distances of Stars by mean of the Phase-lag Method
• Destruction of the central black hole gas reservoir through head-on galaxy collisions
• Particle dispersion in the classical vector dark matter background
• KM3NeT upper bounds of detection rates of solar neutrinos from annihilations of dark matter at the solar core
• Probing the Galactic Potential with Next-Generation Observations of Disk Stars
• Rotation Curve of the Milky Way and the Dark Matter Density
• An Eclectic View of our Milky Way Galaxy
• A new method to unveil embedded stellar clusters
• Galaxy rotation curve from classical Cepheids
• Correlation of gas dynamics and dust in the evolved filament G82.65-02.00
• Optical linear polarization study towards Czernik 3 open cluster at different spatial scales
• Modeling proper motions beyond the Galactic bulge
• Architecture of the Andromeda: a quantitative analysis of clustering in the inner stellar halo
• Gravitational deflection of light in polar-axis plane of a moving Kerr-Newman black hole
• Average Inhomogeneities in Milky Way SNII and The PAMELA Anomaly
• Toward a VLBI resolution of the Pleiades distance controversy
• The kinematical center and mass profile of the Local Group
• Prospects for Wideband VLBI Correlation in the Cloud
• Isolating the pre-main sequence in Collinder34, NGC3293, NGC3766 and NG6231
• Dynamics of tidal spiral arms: Machine learning-assisted identification of equations and application to the Milky Way
• ALMA and VLBA views on the outflow associated with an O-type protostar in G26.50+0.28
• A new estimate of the Local Standard of Rest from data on young Galactic objects
• Three generations of stars: a possible case of triggered star formation
• Water Maser Survey towards off-plane O-rich AGBs around the orbital plane of the Sagittarius Stellar Stream
• Determination of the Solar Galactocentric distance from masers kinemics
• The distances of 61 PGCCs in the Second Galactic Quadrant
• Jets at lowest mass accretion rates
• Toward a Measurement of the Transverse Peculiar Velocity of Galaxy Pairs
• Re-determining the Galactic spiral density wave parameters from data on masers with trigonometric parallaxes
• Massive Stars in Molecular Clouds Rich in High-energy Sources: The Bridge of G332.809-0.132 and CS 78 in NGC 6334
• 86 GHz SiO maser survey of late-type stars in the Inner Galaxy. IV. SiO emission and infrared data for sources in the Scutum and Sagittarius-Carina arms, 20 deg < l < 50 deg
• The nature of ASASSN-24fw's occultation: modelling the event as dimming by optically thick rings around a sub-stellar companion
• Further evidence for natal kick segregation by spectral type in high-mass X-ray binaries
• Constraining Lens Masses in Moderately to Highly Magnified Microlensing Events from Gaia
• Search for High-Mass Protostellar Objects in Cold IRAS Sources
• Capture of field stars by giant interstellar clouds: the formation of moving stellar groups
• On Neutron Star Natal Kicks in High-Mass X-Ray Binaries: Insights from Population Synthesis
• Kinematics of nearby OB3 stars with interstellar CaII line distances
• The Planck submillimeter properties of Galactic high-mass star forming regions: dust temperatures, luminosities, masses and Star Formation Efficiency
• On the Observability of Optically Thin Coronal Hyperfine Structure Lines
• The proper motion and changing jet morphology of Cygnus X-3
• Multiple outflows from the luminous YSO IRAS 07422-2001
• Spatial offsets between interstellar bone-like filaments, radio masers, and cold diffuse CO gas, in the Scutum spiral arm
• A comprehensive search for high-velocity X-ray sources: New compact object binary candidates in the Gaia era
• Dark Matter Energy Deposition and Production from the Table-Top to the Cosmos
• Strong field gravitational lensing of particles by a black-bounce-Schwarzschild black hole
• BFS 10: A nascent bipolar H II region in a filamentary molecular cloud
• On the Nature of the Protoplanetary Nebula OH\,231.8+4.2
• Influence of interstellar environment near the solar system on cosmic-ray spectra and dipole anisotropy
• Infrared polarisation study of Lynds 1340: A case of RNO 8
• HD 69686: A Mysterious High Velocity B Star
• A Kinematically Cold Structure of Candidate Young OB Stars Toward The Anticenter
• Investigating star formation scenarios in the Milky Way using YSO distributions -- A pilot study
• Place of the Radcliffe Wave in the Local System
• Stäckel-type dynamic model of the Galaxy based on maser kinematic data
• Proper Motion and Natal Kick in the Galactic Black Hole X-ray Binary AT2019wey
• 22GHz water maser survey of Xinjiang Astronomical Observatory