2021AJ....161..147B


C.D.S. - SIMBAD4 rel 1.7 - 2021.06.21CEST10:34:51

2021AJ....161..147B - Astron. J., 161, 147-147 (2021/March-0)

Estimating distances from parallaxes. V. Geometric and photogeometric distances to 1.47 billion stars in Gaia early data release 3.

BAILER-JONES C.A.L., RYBIZKI J., FOUESNEAU M., DEMLEITNER M. and ANDRAE R.

Abstract (from CDS):

Stellar distances constitute a foundational pillar of astrophysics. The publication of 1.47 billion stellar parallaxes from Gaia is a major contribution to this. Despite Gaia's precision, the majority of these stars are so distant or faint that their fractional parallax uncertainties are large, thereby precluding a simple inversion of parallax to provide a distance. Here we take a probabilistic approach to estimating stellar distances that uses a prior constructed from a three-dimensional model of our Galaxy. This model includes interstellar extinction and Gaia's variable magnitude limit. We infer two types of distance. The first, geometric, uses the parallax with a direction-dependent prior on distance. The second, photogeometric, additionally uses the color and apparent magnitude of a star, by exploiting the fact that stars of a given color have a restricted range of probable absolute magnitudes (plus extinction). Tests on simulated data and external validations show that the photogeometric estimates generally have higher accuracy and precision for stars with poor parallaxes. We provide a catalog of 1.47 billion geometric and 1.35 billion photogeometric distances together with asymmetric uncertainty measures. Our estimates are quantiles of a posterior probability distribution, so they transform invariably and can therefore also be used directly in the distance modulus (5log10r-5). The catalog may be downloaded or queried using ADQL at various sites (see http://www.mpia.de/~calj/gedr3_distances.html), where it can also be cross-matched with the Gaia catalog.

Abstract Copyright: © 2021. The American Astronomical Society. All rights reserved.

Journal keyword(s): Catalogs - Galaxy structure - Bayesian statistics - Parallax - Stellar parallax - Photometric parallax - Distance indicators - Astrometry - Markov chain Monte Carlo - Absolute magnitude

VizieR on-line data: <CDS Catalogue: I/352>

Simbad objects: 13

goto Full paper

goto View the reference in ADS

Number of rows : 13

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 Gaia EDR3 4295806720 * 02 59 59.0645566331 +00 00 20.280104740           ~ 1 0
2 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5984 1
3 Gaia EDR3 34361129088 * 03 00 01.0053831611 +00 01 15.464243133           ~ 1 0
4 Gaia EDR3 38655544960 * 03 00 01.1631437887 +00 01 11.260989328           ~ 1 0
5 Cl Melotte 22 OpC 03 47 00 +24 07.0           ~ 3094 0
6 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15432 1
7 NGC 2437 OpC 07 41 46 -14 48.6           ~ 142 0
8 Gaia EDR3 5835726688222520960 * 16 05 15.4940728035 -57 26 15.928673376           ~ 1 0
9 Gaia EDR3 5835726683934945280 * 16 05 16.6951839757 -57 26 27.604967350           ~ 1 0
10 M 10 GlC 16 57 09.05 -04 06 01.1     4.98     ~ 719 0
11 NGC 6544 GlC 18 07 20.58 -24 59 50.4   11.36 9.90     ~ 250 0
12 M 28 GlC 18 24 32.89 -24 52 11.4           ~ 690 0
13 NGC 6793 OpC 19 23 18 +22 08.4           ~ 30 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2021AJ....161..147B and select 'bookmark this link' or equivalent in the popup menu


2021.06.21-10:34:51

© Université de Strasbourg/CNRS

    • Contact