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Gaia Data Release 3. Summary of the content and survey properties
Prusti, T.; Mazeh, T.; Zucker, S. +453 more
Context. We present the third data release of the European Space Agency's Gaia mission, Gaia DR3. This release includes a large variety of new data products, notably a much expanded radial velocity survey and a very extensive astrophysical characterisation of Gaia sources.
Aims: We outline the content and the properties of Gaia DR3, providing…
Gaia Data Release 3. Properties and validation of the radial velocities
Smith, M.; Gosset, E.; Caffau, E. +47 more
Context. Gaia Data Release 3 (Gaia DR3) contains the second release of the combined radial velocities. It is based on the spectra collected during the first 34 months of the nominal mission. The longer time baseline and the improvements of the pipeline made it possible to push the processing limit from GRVS = 12 in Gaia DR2 to GRVS…
Gaia Data Release 3. Stellar multiplicity, a teaser for the hidden treasure
Prusti, T.; Mazeh, T.; Zucker, S. +448 more
Context. The Gaia DR3 catalogue contains, for the first time, about 800 000 solutions with either orbital elements or trend parameters for astrometric, spectroscopic, and eclipsing binaries, and combinations of these three.
Aims: With this paper, we aim to illustrate the huge potential of this large non-single-star catalogue.
Methods: Us…
Gaia Data Release 3. Analysis of RVS spectra using the General Stellar Parametriser from spectroscopy
Hatzidimitriou, D.; Schultheis, M.; Marshall, D. J. +77 more
Context. The chemo-physical parametrisation of stellar spectra is essential for understanding the nature and evolution of stars and of Galactic stellar populations. A worldwide observational effort from the ground has provided, in one century, an extremely heterogeneous collection of chemical abundances for about two million stars in total, with f…
Gaia Data Release 3. Astrophysical parameters inference system (Apsis). I. Methods and content overview
Hatzidimitriou, D.; Bouret, J. -C.; Marshall, D. J. +86 more
Gaia Data Release 3 contains a wealth of new data products for the community. Astrophysical parameters are a major component of this release, and were produced by the Astrophysical parameters inference system (Apsis) within the Gaia Data Processing and Analysis Consortium (DPAC). The aim of this paper is to describe the overall content of the astr…
Gaia Data Release 3. Analysis of the Gaia BP/RP spectra using the General Stellar Parameterizer from Photometry
Hatzidimitriou, D.; Marshall, D. J.; Recio-Blanco, A. +80 more
Context. The astrophysical characterisation of sources is among the major new data products in the third Gaia Data Release (DR3). In particular, there are stellar parameters for 471 million sources estimated from low-resolution BP/RP spectra.
Aims: We present the General Stellar Parameterizer from Photometry (GSP-Phot), which is part of the a…
Gaia Data Release 3. Processing and validation of BP/RP low-resolution spectral data
Gilmore, G.; Harrison, D. L.; Bailer-Jones, C. A. L. +51 more
Context. Blue (BP) and Red (RP) Photometer low-resolution spectral data are one of the exciting new products in Gaia Data Release 3 (Gaia DR3). These data have also been used to derive astrometry and integrated photometry in Gaia Early Data Release 3 and astrophysical parameters and Solar System object reflectance spectra in Gaia DR3.
Aims: I…
Gaia Data Release 3. Catalogue validation
Jordi, C.; Luri, X.; Anders, F. +40 more
Context. The third Gaia data release (DR3) provides a wealth of new data products. The early part of the release, Gaia EDR3, already provided the astrometric and photometric data for nearly two billion sources. The full release now adds improved parameters compared to Gaia DR2 for radial velocities, astrophysical parameters, variability informatio…
Improving the open cluster census. II. An all-sky cluster catalogue with Gaia DR3
Reffert, Sabine; Hunt, Emily L.
Context. Data from the Gaia satellite are revolutionising our understanding of the Milky Way. With every new data release, there is a need to update the census of open clusters.
Aims: We aim to conduct a blind, all-sky search for open clusters using 729 million sources from Gaia DR3 down to magnitude G ∼ 20, creating a homogeneous catalogue o…
Gaia Data Release 3. Apsis. II. Stellar parameters
Hatzidimitriou, D.; Bouret, J. -C.; Marshall, D. J. +78 more
Context. The third Gaia data release (Gaia DR3) contains, beyond the astrometry and photometry, dispersed light for hundreds of millions of sources from the Gaia prism spectra (BP and RP) and the spectrograph (RVS). This data release opens a new window on the chemo-dynamical properties of stars in our Galaxy, essential knowledge for understanding …