A three-dimensional map of the Milky Way using 66,000 Mira variable stars

Abstract

We study the three-dimensional structure of the Milky Way using 65,981 Mira variable stars discovered by the Optical Gravitational Lensing Experiment (OGLE) survey. The spatial distribution of the Mira stars is analyzed with a model containing three barred components that include the X-shaped boxy component in the Galactic center (GC), and an axisymmetric disk. We take into account the distance uncertainties by implementing the Bayesian hierarchical inference method. The distance to the GC is $R_0=7.66\pm 0.01(stat.)\pm 0.39(sys.)$ kpc, while the inclination of the major axis of the bulge to the Sun-GC line-of-sight is $\theta =20.2^{\circ }\pm 0.6^{\circ }(stat.)\pm 0.7^{\circ }(sys.)$. We present, for the first time, a detailed three-dimensional map of the Milky Way composed of young and intermediate-age stellar populations. Our analysis provides independent evidence for both the X-shaped bulge component and the flaring disk (being plausibly warped). We provide the complete dataset of properties of Miras that were used for calculations in this work. The table includes: mean brightness and amplitudes in nine photometric bands (covering a range of wavelength from 0.5 to 12 $\mu$m), photometric chemical type, estimated extinction, and calculated distance with its uncertainty for each Mira variable. The median distance accuracy to a Mira star is at the level of $6.6\%$.

arXiv commentAccepted for publication in The Astrophysical Journal Supplement Series. 22 pages, 7 figures, 2 tables. The full machine readable Table 1 and corner plot are available through the OGLE website via https://www.astrouw.edu.pl/ogle/ogle4/MILKY_WAY_3D_MAP/, and Zenodo via https://doi.org/10.5281/zenodo.7472598

References in corpus (85)

• emcee: The MCMC Hammer
• Gaia Data Release 2. Summary of the contents and survey properties
• The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
• The Gaia mission
• The Spitzer Space Telescope Mission
• The Milky Way in Molecular Clouds: A New Complete CO Survey
• The Zwicky Transient Facility: System Overview, Performance, and First Results
• The Man Behind the Curtain: X-rays Drive the UV through NIR Variability in the 2013 AGN Outburst in NGC 2617
• Measuring Distance and Properties of the Milky Way's Central Supermassive Black Hole with Stellar Orbits
• Trigonometric Parallaxes of High Mass Star Forming Regions: the Structure and Kinematics of the Milky Way
• GLIMPSE: I. A SIRTF Legacy Project to Map the Inner Galaxy
• A 3D Dust Map Based on Gaia, Pan-STARRS 1 and 2MASS
• VISTA Variables in the Via Lactea (VVV): The public ESO near-IR variability survey of the Milky Way
• Preliminary Results from NEOWISE: An Enhancement to the Wide-field Infrared Survey Explorer for Solar System Science
• A geometric distance measurement to the Galactic Center black hole with 0.3% uncertainty
• Initial Performance of the NEOWISE Reactivation Mission
• Gaia Data Release 2: using Gaia parallaxes
• Modelling the Galactic Interstellar Extinction Distribution in Three Dimensions
• SINFONI in the Galactic Center: young stars and IR flares in the central light month
• Two Stellar Components in the Halo of the Milky Way
• Three Dimensional Structure of the Milky Way Disk
• The Optical to Mid-Infrared Extinction Law Based on the APOGEE, Gaia DR2, Pan-STARRS1, SDSS, APASS, 2MASS and WISE Surveys
• A three-dimensional Galactic extinction model
• VVV DR1: The First Data Release of the Milky Way Bulge and Southern Plane from the Near-Infrared ESO Public Survey VISTA Variables in the Via Lactea
• Mapping the Three-Dimensional Density of the Galactic Bulge with VVV Red Clump Stars
• Dynamical modelling of the Galactic bulge and bar: the Milky Way's bar pattern speed, stellar, and dark matter mass distribution
• Outer structure of the Galactic warp and flare: explaining the Canis Major over-density
• Two Red Clumps and the X-Shaped Milky Way Bulge
• AGB Variables and the Mira Period-Luminosity Relation
• Exoplanet population inference and the abundance of Earth analogs from noisy, incomplete catalogs
• On Galactic density modeling in the presence of dust extinction
• The Split Red Clump of the Galactic Bulge from OGLE-III
• Three-Dimensional Distribution of the ISM in the Milky Way Galaxy: II. The Molecular Gas Disk
• Modelling the Galactic Bar Using Red Clump Giants
• Three-Dimensional Distribution of the ISM in the Milky Way Galaxy: I. The HI Disk
• Color-Magnitude Diagram Distribution of the Bulge Red Clump Stars - Evidence for the Galactic Bar
• The Spiral Structure of the Outer Milky Way in Hydrogen
• A three-dimensional map of the Milky Way using classical Cepheid variable stars
• Near-Infrared Photometry of Carbon Stars
• Deciphering the 3D structure of the old Galactic bulge from the OGLE RR Lyrae stars
• The structure of the Galactic bar
• Rotation curve of the Milky Way from Classical Cepheids
• An intuitive 3D map of the Galactic warp's precession traced by classical Cepheids
• Kinematics of the old stellar population at the Galactic Center
• The Long Bar in the Milky Way. Corroboration of an old hypothesis
• Lifting the Dusty Veil II: A Large-Scale Study of the Galactic Infrared Extinction Law
• A near-infrared survey of Miras and the distance to the Galactic Centre
• A Precise Determination of the Mid-Infrared Interstellar Extinction Law Based on the APOGEE Spectroscopic Survey
• The long Galactic bar as seen by UKIDSS Galactic Plane Survey
• The Distance to the Galactic Center Derived From Infrared Photometry of Bulge Red Clump Stars
• The Age and Structure of the Galactic Bulge from Mira Variables
• Mira Variables in the OGLE Bulge fields
• Evolution over time of the Milky Way's disc shape
• Chemical evolution of the Milky Way: constraints on the formation of the thick and thin discs
• Infrared Period-Luminosity Relations of Evolved Variable Stars in the Large Magellanic Cloud
• The age of the Milky Way inner stellar spheroid from RR Lyrae population synthesis
• Period-Magnitude relation of Mira-like variables in the Large Magellanic Cloud as a tool to understand circumstellar extinction
• Two estimates of the distance to the Galactic centre
• The Bulge Radial Velocity Assay for RR Lyrae stars (BRAVA-RR) DR2: a Bimodal Bulge?
• The stellar mass distribution of the Milky Way's bar: an analytic model
• Age Demographics of the Milky Way Disk and Bulge
• Large Magellanic Cloud Near-Infrared Synoptic Survey. V. Period-Luminosity Relations of Miras
• The OGLE Collection of Variable Stars. Nearly 66,000 Mira stars in the Milky Way
• Mapping the Galactic disk with the LAMOST and Gaia Red clump sample. VI: An evidence for the long lived non-steady warp of non-gravitational scenarios
• Mira variables in the Galactic bulge with OGLE-II data
• Near-infrared Mira Period-Luminosity Relations in M33
• Quantifying the (X/peanut)-shaped Structure of the Milky Way - New Constraints on the Bar Geometry
• The M33 Synoptic Stellar Survey. II. Mira Variables
• An extremely low mid-infrared extinction law toward the Galactic Center and 4% distance precision to 55 classical Cepheids
• Mid-Infrared Period$-$Luminosity Relations for Miras in the Large Magellanic Cloud
• Multiwavelength Period-Luminosity and Period-Luminosity-Color relations at maximum-light for Mira variables in the Magellanic Clouds
• Mira variables in the Milky Way's nuclear stellar disc: discovery and classification
• Absence of an X-shaped Structure in the Milky Way Bulge Using Mira Variable Stars
• Discovery of carbon-rich Miras in the Galactic bulge
• Multiwavelength properties of Miras
• Trigonometric Distance and Proper Motion of IRAS 20056+3350: Massive Star Forming Region on the Solar Circle
• Long-term Stellar Variability in the Galactic Centre Region
• Age-morphology dependence of the Milky Way boxy/peanut bulge seen in Mira variables
• Light and colour variations of Mira variables in the Small Magellanic Cloud
• Differential rotation of the halo traced by the K-giant stars
• The small boxy/peanut structure of the Milky Way traced by old stars
• Distribution of red clump stars does not support the X-shaped Galactic bulge
• A hierarchical Bayesian model to infer PL(Z) relations using Gaia parallaxes
• The global structure of the Milky Way's stellar halo based on the orbits of local metal-poor stars
• Analysing the structure of the bulge with Mira variables

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• The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
• The far side of the Galactic bar/bulge revealed through semi-regular variables
• RR Lyrae stars trace the Milky Way warp
• Unveiling VVV/WISE Mira variables on the far side of the Galactic disk: Distances, kinematics and a new extinction law
• Long-period maser-bearing Miras in the Galactic center: period-luminosity relations and extinction estimates
• The Variable Sky Through the OGLE Eye