RT journal article
T1 Data Release 3 Summary of the content and survey properties
A1 Vallenari, A.
A1 Brown, A. G. A.
A1 Prusti, T.
A1 de Brujine, J. H. J.
A1 Arenou, F.
A1 Berihuete Macías, Ángel
A2 Estadística e Investigación Operativa
K1 techniques: photometric
K1 techniques: spectroscopic
K1 techniques: radial velocities
K1 catalogs
K1 astrometry
K1 parallaxes
AB Context. We present the third data release of the European Space Agency’s Gaia mission, Gaia DR3. This release includes a large variety of newdata 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 an overview of the main improvements in the data processing in comparison with previous data releases (where applicable) and a brief discussion of the limitations of the data in this release.Methods. The Gaia DR3 catalogue is the outcome of the processing of raw data collected with the Gaia instruments during the first 34 months ofthe mission by the Gaia Data Processing and Analysis Consortium.Results. The Gaia DR3 catalogue contains the same source list, celestial positions, proper motions, parallaxes, and broad band photometry in theG, GBP, and GRP pass-bands already present in the Early Third Data Release, Gaia EDR3. Gaia DR3 introduces an impressive wealth of new dataproducts. More than 33 million objects in the ranges GRVS < 14 and 3100 < Teff < 14 500, have new determinations of their mean radial velocitiesbased on data collected by Gaia. We provide GRVS magnitudes for most sources with radial velocities, and a line broadening parameter is listed fora subset of these. Mean Gaia spectra are made available to the community. The Gaia DR3 catalogue includes about 1 million mean spectra from theradial velocity spectrometer, and about 220 million low-resolution blue and red prism photometer BP/RP mean spectra. The results of the analysisof epoch photometry are provided for some 10 million sources across 24 variability types. Gaia DR3 includes astrophysical parameters and sourceclass probabilities for about 470 million and 1500 million sources, respectively, including stars, galaxies, and quasars. Orbital elements and trendparameters are provided for some 800 000 astrometric, spectroscopic and eclipsing binaries. More than 150 000 Solar System objects, includingnew discoveries, with preliminary orbital solutions and individual epoch observations are part of this release. Reflectance spectra derived fromthe epoch BP/RP spectral data are published for about 60 000 asteroids. Finally, an additional data set is provided, namely the Gaia AndromedaPhotometric Survey, consisting of the photometric time series for all sources located in a 5.5 degree radius field centred on the Andromedagalaxy.Conclusions. This data release represents a major advance with respect to Gaia DR2 and Gaia EDR3 because of the unprecedented quantity,quality, and variety of source astrophysical data. To date this is the largest collection of all-sky spectrophotometry, radial velocities, variables, andastrophysical parameters derived from both low- and high-resolution spectra and includes a spectrophotometric and dynamical survey of SSOsof the highest accuracy. The non-single star content surpasses the existing data by orders of magnitude. The quasar host and galaxy light profilecollection is the first such survey that is all sky and space based. The astrophysical information provided in Gaia DR3 will unleash the full potentialof Gaia’s exquisite astrometric, photometric, and radial velocity surveys.
PB EDP Sciences
SN 0004-6361
YR 2022
FD 2022-05-31
LK http://hdl.handle.net/10498/32138
UL http://hdl.handle.net/10498/32138
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 11-nov-2026