FEDReD I: 3D extinction and stellar maps by Bayesian deconvolution

Abstract

Context. While Gaia enables to probe in great detail the extended local neighbourhood, the thin disk structure at larger distances remains sparsely explored. Aims. We aim here to build a non-parametric 3D model of the thin disc structures handling both the extinction and the stellar density simultaneously. Methods. We developed a Bayesian deconvolution method in two dimensions: extinction and distance. It uses a reference catalogue which completeness information defines the selection function. It is designed so that any complementary information from other catalogues can be added. It has also been designed to be robust to outliers, frequent in crowded fields, and differential extinction. The prior information is designed to be minimal: only a reference H-R diagram. We derived for this an empirical H-R diagram of the thin disk using Gaia DR2 data and synthetic isochrone-based H-R diagrams can also be used. Results. We validated the method on simulations and real fields using 2MASS and UKIDSS data complemented by Gaia DR2 photometry and parallaxes. We detail the results of two test fields: a 2MASS field centred around the NGC 4815 open cluster which shows an over-density of both extinction and stellar density at the cluster distance, and a UKIDSS field at $l=10^{\circ }$ where we recover the position of the Galactic bar.

12 pages, 11 figures

References in corpus (48)

• Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
• Gaia Data Release 2. Summary of the contents and survey properties
• The Gaia mission
• PARSEC: stellar tracks and isochrones with the PAdova and TRieste Stellar Evolution Code
• New evolutionary models for pre-main sequence and main sequence low-mass stars down to the hydrogen-burning limit
• A 3D Dust Map Based on Gaia, Pan-STARRS 1 and 2MASS
• Gaia Data Release 2: Photometric content and validation
• An Analysis of the Shapes of Interstellar Extinction Curves. V. The IR-Through-UV Curve Morphology
• Modelling the Galactic Interstellar Extinction Distribution in Three Dimensions
• A Gaia DR2 view of the Open Cluster population in the Milky Way
• Star counts in the Galaxy. Simulating from very deep to very shallow photometric surveys with the TRILEGAL code
• The UKIDSS Galactic Plane Survey
• Three Dimensional Structure of the Milky Way Disk
• The UKIRT Wide Field Camera ZYJHK Photometric System: Calibration from 2MASS
• The Galactic disk mass-budget : I. stellar mass-function and density
• Mapping the Three-Dimensional Density of the Galactic Bulge with VVV Red Clump Stars
• Gaia-2MASS 3D maps of Galactic interstellar dust within 3 kpc
• The Structure of the Milky Way's Bar Outside the Bulge
• Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18
• Three-dimensional mapping of the local interstellar medium with composite data
• Color-Magnitude Diagram Distribution of the Bulge Red Clump Stars - Evidence for the Galactic Bar
• Three-dimensional interstellar dust reddening maps of the Galactic plane
• The structure of the Galactic bar
• Gaia Data Release 2. Cross-match with external catalogues - Algorithms and results
• The Milky Way's external disc constrained by 2MASS star counts
• Bayesian inference of stellar parameters and interstellar extinction using parallaxes and multiband photometry
• A Distinct Structure Inside the Galactic Bar
• Measuring Distances and Reddenings for a Billion Stars: Towards A 3D Dust Map from Pan-STARRS 1
• The long Galactic bar as seen by UKIDSS Galactic Plane Survey
• Mapping the Milky Way bulge at high resolution: the 3D dust extinction, CO, and X factor maps
• Empirical photometric calibration of the Gaia Red Clump: colours, effective temperature and absolute magnitude
• Synthetic photometry for M and K giants and stellar evolution: hydrostatic dust-free model atmospheres and chemical abundances
• The empirical Gaia G-band extinction coefficient
• Milky Way Tomography IV: Dissecting Dust
• A three dimensional extinction map of the Galactic Anticentre from multi-band photometry
• Three dimensional interstellar extinction map towards the Galactic Bulge
• Inversion of stellar statistics equation for the Galactic Bulge
• Numerical Color-Magnitude Diagram Analysis of SDSS Data and Application to the New Milky Way satellites
• Metallicity and kinematics of the bar in-situ
• Spatial distribution of interstellar dust in the Sun vicinity, comparison with neutral sodium-bearing gas
• The Gaia-ESO Survey: Extracting diffuse interstellar bands from cool star spectra, DIB-based interstellar medium line-of-sight structures at the kpc scale
• 3D Stellar Reddening Map from 2MASS Photometry: An Improved Version
• The Gaia-ESO Survey: Properties of the intermediate age open cluster NGC 4815
• 3D Extinction Mapping Using Hierarchical Bayesian Models
• Inferring the three-dimensional distribution of dust in the Galaxy with a non-parametric method: Preparing for Gaia
• FEDReD II : 3D Extinction Map with 2MASS and Gaia DR2 data
• 3D Galactic dust extinction mapping with multi-band photometry
• Mapping the stellar age of the Milky Way bulge with the VVV. II. Deep JKs catalogs release based on PSF photometry

Cited by in corpus (9)

• Updated Gaia-2MASS 3D maps of Galactic interstellar dust
• Three-dimensional extinction maps: Inverting inter-calibrated extinction catalogues
• GALExtin: An alternative online tool to determine the interstellar extinction in the Milky Way
• Three-dimensional dust density structure of the Orion, Cygnus X,Taurus, and Perseus star-forming regions
• FEDReD II : 3D Extinction Map with 2MASS and Gaia DR2 data
• Distances to nearby molecular clouds traced by young stars
• FEDReD III : Unraveling the 3D structure of Vela
• The "C": The large Chameleon-Musca-Coalsack cloud
• EmulART: Emulating Radiative Transfer -- A pilot study on autoencoder based dimensionality reduction for radiative transfer models