Gaia Early Data Release 3: The Gaia Catalogue of Nearby Stars

Autor(en)

, R. L. Smart, L. M. Sarro, J. Rybizki, C. Reylé, A. C. Robin, N. C. Hambly, U. Abbas, M. A. Barstow, J. H. J. de Bruijne, B. Bucciarelli, J. M. Carrasco, W. J. Cooper, S. T. Hodgkin, E. Masana, D. Michalik, J. Sahlmann, A. Sozzetti, A. Vallenari, T. Prusti, C. Babusiaux, M. Biermann, O. L. Creevey, D. W. Evans, L. Eyer, A. Hutton, F. Jansen, C. Jordi, S. A. Klioner, U. Lammers, L. Lindegren, X. Luri, F. Mignard, C. Panem, D. Hestroffer, C. Aerts, J. Alves, P. Charlot, M. Crosta, M. Hauser, T. Lebzelter, R. G. Mann, L. Molnár, A. Riva, M. Schultheis, J. Souchay, L. Szabados, M. B. Taylor, N. Unger, M. Weiler, T. Wevers, Ł. Wyrzykowski, A. Yoldas, P. Yvard, H. Zhao, J. Zorec, S. Zucker, C. Zurbach, T. Zwitter

Abstrakt

Aims. We produce a clean and well-characterised catalogue of objects within 100 pc of the Sun from the Gaia Early Data Release 3. We characterise the catalogue through comparisons to the full data release, external catalogues, and simulations. We carry out a first analysis of the science that is possible with this sample to demonstrate its potential and best practices for its use.

Methods. Theselection of objects within 100 pc from the full catalogue used selected training sets, machine-learning procedures, astrometric quantities, and solution quality indicators to determine a probability that the astrometric solution is reliable. The training set construction exploited the astrometric data, quality flags, and external photometry. For all candidates we calculated distance posterior probability densities using Bayesian procedures and mock catalogues to define priors. Any object with reliable astrometry and a non-zero probability of being within 100 pc is included in the catalogue.

Results. We have produced a catalogue of 331 312 objects that we estimate contains at least 92% of stars of stellar type M9 within 100 pc of the Sun. We estimate that 9% of the stars in this catalogue probably lie outside 100 pc, but when the distance probability function is used, a correct treatment of this contamination is possible. We produced luminosity functions with a high signal-to-noise ratio for the main-sequence stars, giants, and white dwarfs. We examined in detail the Hyades cluster, the white dwarf population, and wide-binary systems and produced candidate lists for all three samples. We detected local manifestations of several streams, superclusters, and halo objects, in which we identified 12 members of Gaia Enceladus. We present the first direct parallaxes of five objects in multiple systems within 10 pc of the Sun.

Conclusions. We provide the community with a large, well-characterised catalogue of objects in the solar neighbourhood. This is a primary benchmark for measuring and understanding fundamental parameters and descriptive functions in astronomy.

Organisation(en)

Institut für Astrophysik

Externe Organisation(en)

Université de recherche Paris Sciences et Lettres, INAF-Osservatorio Astrofisico di Torino, Universidad Nacional de Educacion a Distancia (UNED), Max-Planck-Institut für Astronomie, Université de Franche-Comté, University of Edinburgh, University of Leicester, European Space Research & Technology Centre (ESA/ESTEC), Universitat de Barcelona, University of Hertfordshire, University of Cambridge, European Space Astronomy Centre (ESA), INAF - Osservatorio Astronomico di Padova, Université Grenoble-Alpes, Universität Heidelberg, Université Côte d'Azur, Universität Genf, ATG Europe for ESA/ESAC, Madrid, Spain, Technische Universität Dresden, Lund University, Centre national d'études spatiales (CNES), Katholieke Universiteit Leuven, Universität Bordeaux, TRUMPF Photonic Components GmbH, Magyar Tudományos Akadémia, Eötvös Loránd University Budapest, University of Bristol, University of Warsaw, Institut d'astrophysique de Paris (IAP), UMR7095 - CNRS, Radboud University, Tel Aviv University, Laboratoire Univers et Particules de Montpellier, University of Ljubljana

Journal

Astronomy & Astrophysics

Band

649

Anzahl der Seiten

44

ISSN

0004-6361

DOI

https://doi.org/10.1051/0004-6361/202039498

Publikationsdatum

05-2021

Peer-reviewed

Ja

ÖFOS 2012

103003 Astronomie, 103004 Astrophysik, 103038 Weltraumforschung

Schlagwörter

ASJC Scopus Sachgebiete

Astronomy and Astrophysics, Space and Planetary Science

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/f497be3b-5a12-47c2-b356-f956afb87033