Gaia Data Release 3: The extragalactic content
Astrophysics of Galaxies
2023-06-28 v1
Abstract
The Gaia Galactic survey mission is designed and optimized to obtain astrometry, photometry, and spectroscopy of nearly two billion stars in our Galaxy. Yet as an all-sky multi-epoch survey, Gaia also observes several million extragalactic objects down to a magnitude of G~21 mag. Due to the nature of the Gaia onboard selection algorithms, these are mostly point-source-like objects. Using data provided by the satellite, we have identified quasar and galaxy candidates via supervised machine learning methods, and estimate their redshifts using the low resolution BP/RP spectra. We further characterise the surface brightness profiles of host galaxies of quasars and of galaxies from pre-defined input lists. Here we give an overview of the processing of extragalactic objects, describe the data products in Gaia DR3, and analyse their properties. Two integrated tables contain the main results for a high completeness, but low purity (50-70%), set of 6.6 million candidate quasars and 4.8 million candidate galaxies. We provide queries that select purer sub-samples of these containing 1.9 million probable quasars and 2.9 million probable galaxies (both 95% purity). We also use high quality BP/RP spectra of 43 thousand high probability quasars over the redshift range 0.05-4.36 to construct a composite quasar spectrum spanning restframe wavelengths from 72-100 nm.
Cite
@article{arxiv.2206.05681,
title = {Gaia Data Release 3: The extragalactic content},
author = {Gaia Collaboration and C. A. L. Bailer-Jones and D. Teyssier and L. Delchambre and C. Ducourant and D. Garabato and D. Hatzidimitriou and S. A. Klioner and L. Rimoldini and I. Bellas-Velidis and R. Carballo and M. I. Carnerero and C. Diener and M. Fouesneau and L. Galluccio and P. Gavras and A. Krone-Martins and C. M. Raiteri and R. Teixeira and A. G. A. Brown and A. Vallenari and T. Prusti and J. H. J. de Bruijne and F. Arenou and C. Babusiaux and M. Biermann and O. L. Creevey and D. W. Evans and L. Eyer and R. Guerra and A. Hutton and C. Jordi and U. L. Lammers and L. Lindegren and X. Luri and F. Mignard and C. Panem and D. Pourbaix and S. Randich and P. Sartoretti and C. Soubiran and P. Tanga and N. A. Walton and U. Bastian and R. Drimmel and F. Jansen and D. Katz and M. G. Lattanzi and F. van Leeuwen and J. Bakker and C. Cacciari and J. Castañeda and F. De Angeli and C. Fabricius and Y. Frémat and A. Guerrier and U. Heiter and E. Masana and R. Messineo and N. Mowlavi and C. Nicolas and K. Nienartowicz and F. Pailler and P. Panuzzo and F. Riclet and W. Roux and G. M. Seabroke and R. Sordo and F. Thévenin and G. Gracia-Abril and J. Portell and M. Altmann and R. Andrae and M. Audard and K. Benson and J. Berthier and R. Blomme and P. W. Burgess and D. Busonero and G. Busso and H. Cánovas and B. Carry and A. Cellino and N. Cheek and G. Clementini and Y. Damerdji and M. Davidson and P. de Teodoro and M. Nuñez Campos and A. Dell'Oro and P. Esquej and J. Fernández-Hernández and E. Fraile and P. García-Lario and E. Gosset and R. Haigron and J. -L. Halbwachs and N. C. Hambly and D. L. Harrison and J. Hernández and D. Hestroffer and S. T. Hodgkin and B. Holl and K. Janßen and G. Jevardat de Fombelle and S. Jordan and A. C. Lanzafame and W. Löffler and O. Marchal and P. M. Marrese and A. Moitinho and K. Muinonen and P. Osborne and E. Pancino and T. Pauwels and A. Recio-Blanco and C. Reylé and M. Riello and T. Roegiers and J. Rybizki and L. M. Sarro and C. Siopis and M. Smith and A. Sozzetti and E. Utrilla and M. van Leeuwen and U. Abbas and P. Ábrahám and A. Abreu Aramburu and C. Aerts and J. J. Aguado and M. Ajaj and F. Aldea-Montero and G. Altavilla and M. A. Álvarez and J. Alves and R. I. Anderson and E. Anglada Varela and T. Antoja and D. Baines and S. G. Baker and L. Balaguer-Núñez and E. Balbinot and Z. Balog and C. Barache and D. Barbato and M. Barros and M. A. Barstow and S. Bartolomé and J. -L. Bassilana and N. Bauchet and U. Becciani and M. Bellazzini and A. Berihuete and M. Bernet and S. Bertone and L. Bianchi and A. Binnenfeld and S. Blanco-Cuaresma and T. Boch and A. Bombrun and D. Bossini and S. Bouquillon and A. Bragaglia and L. Bramante and E. Breedt and A. Bressan and N. Brouillet and E. Brugaletta and B. Bucciarelli and A. Burlacu and A. G. Butkevich and R. Buzzi and E. Caffau and R. Cancelliere and T. Cantat-Gaudin and T. Carlucci and J. M. Carrasco and L. Casamiquela and M. Castellani and A. Castro-Ginard and L. Chaoul and P. Charlot and L. Chemin and V. Chiaramida and A. Chiavassa and N. Chornay and G. Comoretto and G. Contursi and W. J. Cooper and T. Cornez and S. Cowell and F. Crifo and M. Cropper and M. Crosta and C. Crowley and C. Dafonte and A. Dapergolas and P. David and P. de Laverny and F. De Luise and R. De March and J. De Ridder and R. de Souza and A. de Torres and E. F. del Peloso and E. del Pozo and M. Delbo and A. Delgado and J. -B. Delisle and C. Demouchy and T. E. Dharmawardena and S. Diakite and E. Distefano and C. Dolding and H. Enke and C. Fabre and M. Fabrizio and S. Faigler and G. Fedorets and P. Fernique and F. Figueras and Y. Fournier and C. Fouron and F. Fragkoudi and M. Gai and A. Garcia-Gutierrez and M. Garcia-Reinaldos and M. García-Torres and A. Garofalo and A. Gavel and E. Gerlach and R. Geyer and P. Giacobbe and G. Gilmore and S. Girona and G. Giuffrida and R. Gomel and A. Gomez and J. González-Núñez and I. González-Santamaría and J. J. González-Vidal and M. Granvik and P. Guillout and J. Guiraud and R. Gutiérrez-Sánchez and L. P. Guy and M. Hauser and M. Haywood and A. Helmer and A. Helmi and M. H. Sarmiento and S. L. Hidalgo and N. Hładczuk and D. Hobbs and G. Holland and H. E. Huckle and K. Jardine and G. Jasniewicz and A. Jean-Antoine Piccolo and Ó. Jiménez-Arranz and J. Juaristi Campillo and F. Julbe and L. Karbevska and P. Kervella and S. Khanna and M. Kontizas and G. Kordopatis and A. J. Korn and Á Kóspál and Z. Kostrzewa-Rutkowska and K. Kruszyńska and M. Kun and P. Laizeau and S. Lambert and A. F. Lanza and Y. Lasne and J. -F. Le Campion and Y. Lebreton and T. Lebzelter and S. Leccia and N. Leclerc and I. Lecoeur-Taibi and S. Liao and E. L. Licata and H. E. P. Lindstrøm and T. A. Lister and E. Livanou and A. Lobel and A. Lorca and C. Loup and P. Madrero Pardo and A. Magdaleno Romeo and S. Managau and R. G. Mann and M. Manteiga and J. M. Marchant and M. Marconi and J. Marcos and M. M. S. Marcos Santos and D. Marín Pina and S. Marinoni and F. Marocco and D. J. Marshall and L. Martin Polo and J. M. Martín-Fleitas and G. Marton and N. Mary and A. Masip and D. Massari and A. Mastrobuono-Battisti and T. Mazeh and P. J. McMillan and S. Messina and D. Michalik and N. R. Millar and A. Mints and D. Molina and R. Molinaro and L. Molnár and G. Monari and M. Monguió and P. Montegriffo and A. Montero and R. Mor and A. Mora and R. Morbidelli and T. Morel and D. Morris and T. Muraveva and C. P. Murphy and I. Musella and Z. Nagy and L. Noval and F. Ocaña and A. Ogden and C. Ordenovic and J. O. Osinde and C. Pagani and I. Pagano and L. Palaversa and P. A. Palicio and L. Pallas-Quintela and A. Panahi and S. Payne-Wardenaar and X. Peñalosa Esteller and A. Penttilä and B. Pichon and A. M. Piersimoni and F. -X. Pineau and E. Plachy and G. Plum and E. Poggio and A. Prša and L. Pulone and E. Racero and S. Ragaini and M. Rainer and P. Ramos and M. Ramos-Lerate and P. Re Fiorentin and S. Regibo and P. J. Richards and C. Rios Diaz and V. Ripepi and A. Riva and H. -W. Rix and G. Rixon and N. Robichon and A. C. Robin and C. Robin and M. Roelens and H. R. O. Rogues and L. Rohrbasser and M. Romero-Gómez and N. Rowell and F. Royer and D. Ruz Mieres and K. A. Rybicki and G. Sadowski and A. Sáez Núñez and A. Sagristà Sellés and J. Sahlmann and E. Salguero and N. Samaras and V. Sanchez Gimenez and N. Sanna and R. Santoveña and M. Sarasso and M. S. Schultheis and E. Sciacca and M. Segol and J. C. Segovia and D. Ségransan and D. Semeux and S. Shahaf and H. I. Siddiqui and A. Siebert and L. Siltala and A. Silvelo and E. Slezak and I. Slezak and R. L. Smart and O. N. Snaith and E. Solano and F. Solitro and D. Souami and J. Souchay and A. Spagna and L. Spina and F. Spoto and I. A. Steele and H. Steidelmüller and C. A. Stephenson and M. Süveges and J. Surdej and L. Szabados and E. Szegedi-Elek and F. Taris and M. B. Taylor and L. Tolomei and N. Tonello and F. Torra and J. Torra and G. Torralba Elipe and M. Trabucchi and A. T. Tsounis and C. Turon and A. Ulla and N. Unger and M. V. Vaillant and E. van Dillen and W. van Reeven and O. Vanel and A. Vecchiato and Y. Viala and D. Vicente and S. Voutsinas and M. Weiler and T. Wevers and Ł. Wyrzykowski and A. Yoldas and P. Yvard and H. Zhao and J. Zorec and S. Zucker and T. Zwitter},
journal= {arXiv preprint arXiv:2206.05681},
year = {2023}
}
Comments
Accepted to A&A