Gaia Data Release 3: A golden sample of astrophysical parameters

Context.Gaia Data Release 3 (DR3) provides a wealth of new data products for the astronomical community to exploit, including astrophysical parameters half billion stars. In this work, we demonstrate high quality these and illustrate their use in different contexts. Aims. We produce homogeneous samples stars with high-quality by exploiting Gaia DR3, while focusing on many regimes across Hertzsprung-Russell (HR) diagram; spectral types OBA, FGKM, ultracool dwarfs (UCDs). also focus specific subsamples particular interest community: solar analogues, carbon stars, spectrophotometric standard (SPSS). Methods. query parameter tables along other DR3 derive interest. validate our results using catalogue itself comparison external data. Results. produced six HR diagram exploit. first three that span large space: young massive disc (OBA; about Million), FGKM type (about UCDs 20 000). provide sources additional information (either flag or complementary parameters) as are made available archive. identify 15 740 bone fide 5863 set stellar SPSS sample. some applications subset OBA sample its usefulness analysing Milky Way rotation curve. then properties analyse known exoplanet systems. ages unseen UCD-companions additionally predict colours Sun various passbands ( , 2MASS, WISE) solar-analogue Conclusions.Gaia contains