The 6-GHz methanol multibeam maser catalogue I: Galactic Centre region, longitudes 345 to 6

Abstract

We have conducted a Galactic plane survey of methanol masers at 6668 MHz using a 7-beam receiver on the Parkes telescope. Here we present results from the first part, which provides sensitive unbiased coverage of a large region around the Galactic Centre. Details are given for 183 methanol maser sites in the longitude range 345${}^{\circ }$ through the Galactic Centre to 6${}^{\circ }$. Within 6${}^{\circ }$ of the Centre, we found 88 maser sites, of which more than half (48) are new discoveries. The masers are confined to a narrow Galactic latitude range, indicative of many sources at the Galactic Centre distance and beyond, and confined to a thin disk population; there is no high latitude population that might be ascribed to the Galactic Bulge. Within 2${}^{\circ }$ of the Galactic Centre the maser velocities all lie between -60 and +77 \kms, a range much smaller than the 540 \kms range observed in CO. Elsewhere, the maser with highest positive velocity (+107 \kms) occurs, surprisingly, near longitude 355${}^{\circ }$ and is probably attributable to the Galactic bar. The maser with the most negative velocity (-127 \kms) is near longitude 346${}^{\circ }$, within the longitude-velocity locus of the near side of the `3-kpc arm'. It has the most extreme velocity of a clear population of masers associated with the near and far sides of the 3-kpc arm. Closer to the Galactic Centre the maser space density is generally low, except within 0.25 kpc of the Centre itself, the `Galactic Centre Zone', where it is 50 times higher, which is hinted at by the longitude distribution, and confirmed by the unusual velocities.

35 pages, 5 figures

References in corpus (11)

• Trigonometric Parallaxes of Massive Star Forming Regions: VI. Galactic Structure, Fundamental Parameters and Non-Circular Motions
• The uncertainty in Galactic parameters
• Distribution functions for the Milky Way
• The 6-GHz Multibeam Maser Survey I. Techniques
• Precise Positions of Methanol Masers
• The Arecibo Methanol Maser Galactic Plane Survey--I: Data
• Physical and chemical conditions in methanol maser selected hot-cores and UCHII regions
• A multi-transition molecular line study of candidate massive young stellar objects associated with methanol masers
• High-Mass Star Formation in the Near and Far 3-KPC Arms
• A general catalogue of 6.7GHz methanol masers II: statistical analysis
• VLBA Observations of G5.89-0.39: OH masers and magnetic field structure

Cited by in corpus (155)

• Variations in the Galactic star formation rate and density thresholds for star formation
• The Red MSX Source Survey: the Massive Young Stellar Population of our Galaxy
• The observed spiral structure of the Milky Way
• ATLASGAL - Compact source catalogue: 330 < l < 21 degrees
• ATLASGAL --- towards a complete sample of massive star forming clumps
• The Green Bank Telescope HII Region Discovery Survey II. The Source Catalog
• Molecular gas kinematics within the central 250 pc of the Milky Way
• Ammonia from cold high-mass clumps discovered in the inner Galactic disk by the ATLASGAL survey
• The Bar and Spiral Structure Legacy (BeSSeL) Survey: Mapping the Milky Way with VLBI Astrometry
• The RMS Survey: Galactic distribution of massive star formation
• ATLASGAL --- Environments of 6.7\,GHz methanol masers
• The 6-GHz methanol multibeam maser catalogue II: Galactic longitudes 6 to 20
• ATLASGAL --- properties of compact HII regions and their natal clumps
• The 6-GHz methanol multibeam maser catalogue IV: Galactic longitudes 186 to 330 including the Orion-Monoceros region
• G0.253+0.016: a molecular cloud progenitor of an Arches-like cluster
• Confirmation of the exclusive association between 6.7-GHz methanol masers and high-mass star formation regions
• The Galactic Center Molecular Cloud Survey. I. A Steep Linewidth-Size Relation & Suppression of Star Formation
• ATLASGAL-selected massive clumps in the inner Galaxy: I. CO depletion and isotopic ratios
• Southern class I methanol masers at 36 and 44 GHz
• The Galactic Center Cloud G0.253+0.016: A Massive Dense Cloud with low Star Formation Potential
• Class I and Class II methanol masers in high-mass star forming regions
• Distributed star formation throughout the Galactic Center cloud Sgr B2
• ATLASGAL - Kinematic distances and the dense gas mass distribution of the inner Galaxy
• The earliest phases of high-mass star formation, as seen in NGC 6334 by \emph{Herschel}
• A 95 GHz Class I Methanol Maser Survey Toward GLIMPSE Extended Green Objects (EGOs)
• Accurate water maser positions from HOPS
• Detection of Widespread Hot Ammonia in the Galactic Center
• Seeding the Galactic Centre gas stream: gravitational instabilities set the initial conditions for the formation of protocluster clouds
• A heat-wave of accretion energy traced by masers in the G358-MM1 high-mass protostar
• Offset between stellar spiral arms and gas arms of the Milky Way
• The SEDIGISM survey: Molecular clouds in the inner Galaxy
• Tracing the Conversion of Gas into Stars in Young Massive Cluster Progenitors
• Major structures of the inner Galaxy delineated by 6.7-GHz methanol masers
• Sub-arcsecond (sub)millimeter imaging of the massive protocluster G358.93-0.03: Discovery of 14 new methanol maser lines associated with a hot core
• A multi-wavelength view of the Galactic center dust ridge reveals little star formation
• Statistical properties of 12.2 GHz methanol masers associated with a complete sample of 6.7 GHz methanol masers
• CMZoom: Survey Overview and First Data Release
• Abundant Methanol Masers but no New Evidence for Star Formation in GCM0.253+0.016
• The Bar and Spiral Arms in the Milky Way: Structure and Kinematics
• The almost ubiquitous association of 6.7 GHz methanol masers with dust
• Star Formation Rates of Massive Molecular Clouds in the Central Molecular Zone
• The statistics of triggered star formation: an overdensity of massive YSOs around Spitzer bubbles
• Star formation in a high-pressure environment: An SMA view of the Galactic centre dust ridge
• The MPIfR-MeerKAT Galactic Plane survey I -- System setup and early results
• Water masers accompanying OH and methanol masers in star formation regions
• The ATLASGAL survey: The sample of young massive cluster progenitors
• Constraining the properties of 1.2-mm dust clumps that contain luminous water masers
• A Census of Early Phase High-Mass Star Formation in the Central Molecular Zone
• Early stage massive star formation near the Galactic Center: Sgr C
• Observations of 6.7 GHz Methanol Masers with EAVN I: VLBI Images of the first Epoch of Observations
• Detection of new methanol maser transitions associated with G358.93-0.03
• Discovery of six new class II methanol maser transitions, including the unambiguous detection of three torsionally excited lines toward G358.931-0.030
• 12.2-GHz methanol maser MMB follow-up catalogue - I. Longitude range 330 to 10 degrees
• H2O Southern Galactic Plane Survey (HOPS): Paper III - Properties of Dense Molecular Gas across the Inner Milky Way
• A 6.7 GHz Methanol Maser Survey II. Low Galactic Latitudes
• CHIMPS2: Survey description and ${}^{12}$CO emission in the Galactic Centre
• Discovery of four periodic methanol masers and updated light curve for a further one
• Young massive star cluster formation in the Galactic Centre is driven by global gravitational collapse of high-mass molecular clouds
• High-mass Starless Clumps in the inner Galactic Plane: the Sample and Dust Properties
• First Parallax Measurements Towards a 6.7 GHz Methanol Maser with the Australian Long Baseline Array - Distance to G339.884-1.259
• OH maser emission in the THOR survey of the northern Milky Way
• Parkes full polarization spectra of OH masers - I. Galactic longitudes 350 through the Galactic Centre to 41
• High-mass star-forming cloud G0.38+0.04 in the Galactic Center Dust Ridge contains H2CO and SiO masers
• Hundreds of new cluster candidates in the VISTA variables in the Via Lactea survey DR1
• New Periodic 6.7 GHz Class II Methanol Maser Associated with G358.460-0.391
• 37 GHz methanol masers : Horsemen of the Apocalypse for the class II methanol maser phase?
• ATLASGAL --- Molecular fingerprints of a sample of massive star forming clumps
• The G305 star-forming complex: Embedded Massive Star Formation Discovered by Herschel Hi-GAL
• Excited-state hydroxyl maser catalogue from the methanol multibeam survey -- I. Positions and Variability
• 12.2-GHz methanol maser MMB follow-up catalogue - II. Longitude range 186 to 330 degrees
• A Keplerian disk with a four-arm spiral birthing an episodically accreting high-mass protostar
• A search for water masers associated with class II methanol masers - II. Longitude range 341${}^{\circ }$ to 6${}^{\circ }$
• A 95 GHz Class I Methanol Maser Survey Toward A Sample of GLIMPSE Point Sources Associated with BGPS Clumps
• The Lifetimes of Phases in High-Mass Star-Forming Regions
• ATLASGAL - Ammonia observations towards the southern Galactic Plane
• A Global View on Star Formation: The GLOSTAR Galactic Plane Survey V. 6.7 GHz Methanol Maser Catalogue
• A search for 95 GHz class I methanol masers in molecular outflows
• A Protostellar Jet Emanating from a Hypercompact HII Region
• A search for water masers associated with class II methanol masers - I. Longitude range 6 to 20 degrees
• A 6.7 GHz Methanol Maser Survey at High Galactic Latitudes
• The shortest periodic and flaring flux variability of a methanol maser emission at 6.7 GHz in G 014.23-00.50
• Practical Limitations on Astrophysical Observations of Methanol to Investigate Variations in the Proton-to-Electron Mass Ratio
• Discovery of periodic class II methanol masers associated with G339.986-0.425 region
• Discovery of the new class I methanol maser transition at 23.4 GHz
• Constraining the population of isolated massive stars within the Central Molecular Zone
• A global view on star formation: The GLOSTAR Galactic plane survey III. 6.7 GHz methanol maser survey in Cygnus X
• Excited-state hydroxyl maser polarimetry: Who ate all the πs?
• A WISE Survey of New Star Clusters in the Central Plane Region of the Milky Way
• 84-GHz methanol masers, their relationship to 36-GHz methanol masers and their molecular environments
• The physical and chemical structure of Sagittarius B2 -- VI. UCHII regions in Sgr B2
• 12.2-GHz methanol maser MMB follow-up catalogue - III. Longitude range 10 to 20 degrees
• HI Absorption Toward HII Regions at Small Galactic Longitudes
• 6.7 GHz variability characteristics of new periodic methanol maser sources
• A global view on star formation: The GLOSTAR Galactic plane survey IV. Radio continuum detections of young stellar objects in the Galactic Centre region
• Detection of 36 GHz Class I Methanol Maser Emission Towards NGC 4945
• The VVV Near-IR Galaxy Catalogue beyond the Galactic disk
• Accurate OH maser positions II. the Galactic Center region
• Testing maser-based evolutionary schemes: A new search for 37.7-GHz methanol masers
• A multi-transition methanol maser study of the accretion burst source G358.93-0.03-MM1
• Accurate OH Maser Positions From The SPLASH Survey III: The Final 96 Square Degrees
• The 6-GHz multibeam maser survey III: comparison between the MMB and HOPS
• A 6.7 GHz methanol maser survey of the central molecular zone
• Deep near-infrared adaptive optics observations of a young embedded cluster at the edge of the RCW 41 HII region
• The Evolutionary Status of Protostellar Clumps Hosting Class II Methanol Masers
• ATLASGAL -- Relationship between dense star forming clumps and interstellar masers
• Methanol Maser Emission from Galactic Center Sources with Excess 4.5 μm Emission
• Discovery of Two New Class II Methanol Maser Transitions in G345.01+1.79
• Parkes full polarization spectra of OH masers - II. Galactic longitudes 240 to 350
• Star Formation Sites toward the Galactic Center Region: The Correlation of CH3OH Masers, H2O Masers, and Near-IR Green Sources
• Star forming activity in the H II regions associated with IRAS 17160-3707 complex
• G10.472+0.027: An Extreme water maser outflow associated with a Massive Protostellar Cluster
• High Velocity Compact Clouds in the Sagittarius C Region
• New detections of HC${}_5$N toward hot cores associated with 6.7 GHz methanol masers
• The mid-infrared environments of 6.7 GHz Methanol Masers from the Methanol Multi-Beam Survey
• The first high-resolution observations of 19.9-GHz methanol masers
• 44 GHz methanol masers: Observations toward 95 GHz methanol masers
• The relationship between Class I and Class II methanol masers at high angular resolution
• A search for radio jets from massive young stellar objects. Association of radio jets with H2O and CH3OH masers
• A Face-on Accretion System in High-Mass Star-Formation: Possible Dusty Infall Streams within 100 AU
• Infrared dust bubble CS51 and its interaction with the surrounding interstellar medium
• The physical parameters of clumps associated with class I methanol masers
• Probing the early phases of high mass star formation with 6.7 GHz methanol masers
• Extended HNCO, SiO, and HC${}_3$N emission in 43 southern star-forming regions
• Simulated Galactic methanol maser distribution to constrain Milky Way parameters
• MAGMO: Polarimetry of 1720-MHz OH Masers towards Southern Star Forming Regions
• The warm-up phase in massive star-forming cores around RCW 120
• A 4-6 GHz Radio Recombination Line Survey in the Milky Way
• Molecular line search toward the flaring 6.7-GHz methanol masers of G24.33+0.13 and G359.6-0.243: rare maser transitions detected
• Warm ISM in the Sgr A Complex. I: Mid-J CO, atomic carbon, ionized atomic carbon,and ionized nitrogen sub-mm/FIR line observations with the Herschel-HIFI and NANTEN2/SMART telescopes
• Massive Young Stellar Objects in the Galactic Center. II. Seeing Through the Ice-rich Envelopes
• Inverse MultiView II: Microarcsecond Trigonometric Parallaxes for Southern Hemisphere 6.7~GHz Methanol Masers G232.62+00.99 and G323.74$-$00.26
• Investigations of the Class I methanol masers in NGC 4945
• Effects of infall and outflow on massive star-forming regions
• The RMS Survey: Ammonia mapping of the environment of young massive stellar objects II
• Ammonia masers toward G358.931-0.030
• Detection of 84-GHz class I methanol maser emission towards NGC 253
• High-Sensitivity Observations of Molecular Lines with the Arecibo Telescope
• Molecular gas and star formation towards the IR dust bubble S24 and its environs
• Searching for nascent planetary nebulae: OHPNe candidates in the SPLASH survey
• High-mass star formation toward southern infrared bubble S10
• CMZoom III: Spectral Line Data Release
• Detection of the longest periodic variability in 6.7 GHz methanol masers G5.900-0.430
• SCOTCH -- Search for Clandestine Optically Thick Compact HIIs
• On the many '3-kiloparsec arms' - shocked wave and nuclear rotation
• SCOTCH Search for Clandestine Optically Thick Compact HII regions II
• HCN $J$=4-3, HNC $J$=1-0, ${\mathrm{H}}^{13}\mathrm{CN}$ $J$=1-0, and $\mathrm{H}{\mathrm{C}}_3\mathrm{N}$ $J$=10-9 Maps of Galactic Center Region II.: Physical Properties of Dense Gas Clumps and Probability of Star Formation
• The G332 molecular cloud ring: I. Morphology and physical characteristics
• Maser Emission toward the Infrared Dark Cloud G359.94+0.17 Seen in Silhouette against the Galactic Center
• History of Astronomy in Australia: Big-Impact Astronomy from World War II until the Lunar Landing (1945-1969)
• Characterizing [C II] Line Emission In Massive Star Forming Clumps
• Backlighting young stellar objects in the Central Molecular Zone: an ensemble-averaged abundance structure of methanol ices
• Molecular gas kinematics of the CMZ: Great oaks from little acorns grow
• Simultaneous 22 GHz Water and 44 GHz Methanol Masers Survey of Ultracompact HII Regions
• 6.7 GHz CH3OH absorption towards the N3 Galactic Center point-source
• Unraveling the Spectral Energy Distributions of Clustered YSOs