The Galaxy in your preferred colours: Synthetic photometry from Gaia low-resolution spectra

被引：72

作者：

Montegriffo, P. ^{[1
]}

Bellazzini, M. ^{[1
]}

De Angeli, F. ^{[2
]}

Andrae, R. ^{[3
]}

Barstow, M. A. ^{[4
]}

Bossini, D. ^{[5
]}

Bragaglia, A. ^{[1
]}

Burgess, P. W. ^{[2
]}

Cacciari, C. ^{[1
]}

Carrasco, J. M. ^{[6
]}

Chornay, N. ^{[2
]}

Delchambre, L. ^{[7
]}

Evans, D. W. ^{[2
]}

Fouesneau, M. ^{[3
]}

Fremat, Y. ^{[8
]}

Garabato, D. ^{[9
]}

Jordi, C. ^{[6
]}

Manteiga, M. ^{[10
]}

Massari, D. ^{[1
]}

Palaversa, L. ^{[2
,11
]}

Pancino, E. ^{[12
,13
]}

Riello, M. ^{[2
]}

Mieres, D. Ruz ^{[2
]}

Sanna, N. ^{[12
]}

Santovena, R. ^{[9
]}

Sordo, R. ^{[14
]}

Vallenari, A. ^{[14
]}

Walton, N. A. ^{[2
]}

Brown, A. G. A. ^{[15
]}

Prusti, T. ^{[16
]}

de Bruijne, J. H. J. ^{[16
]}

Arenou, F. ^{[17
]}

Babusiaux, C. ^{[17
,18
]}

Biermann, M. ^{[19
]}

Creevey, O. L. ^{[20
]}

Ducourant, C. ^{[21
]}

Eyer, L. ^{[22
]}

Guerra, R. ^{[23
]}

Hutton, A. ^{[24
]}

Klioner, S. A. ^{[25
]}

Lammers, U. L. ^{[23
]}

Lindegren, L. ^{[26
]}

Luri, X. ^{[6
]}

Mignard, F. ^{[20
]}

Panem, C. ^{[27
]}

Pourbaix, D. ^{[28
,29
]}

Randich, S. ^{[12
]}

Sartoretti, P. ^{[17
]}

Soubiran, C. ^{[21
]}

Tanga, P. ^{[20
]}

机构：

[1] INAF Osservatorio Astrofis & Sci Spazio Bologna, Via Piero Gobetti 93-3, I-40129 Bologna, Italy

[2] Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England

[3] Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany

[4] Univ Leicester, Sch Phys & Astron, Space Pk Leicester,Univ Rd, Leicester LE1 7RH, Leics, England

[5] Univ Porto, CAUP, Inst Astrofis & Ciencias Espaco, Rua Estrelas, P-4150762 Porto, Portugal

[6] Univ Barcelona IEEC UB, Inst Ciencies Cosmos ICCUB, Marti & Franques 1, Barcelona, Spain

[7] Univ Liege, Inst Astrophys & Geophys, 19c Allee 6 Aout, B-4000 Liege, Belgium

[8] Royal Observ Belgium, Ringlaan 3, B-1180 Brussels, Belgium

[9] Univ A Coruna, CIGUS CITIC Dept Comp Sci & Informat Technol, Campus Elvina S-N, La Coruna 15071, Spain

[10] Univ A Coruna, CIGUS CITIC, Dept Naut Sci & Marine Engn, Paseo Ronda 51, La Coruna 15071, Spain

[11] Rudjer Boskovic Inst, Bijenicka Cesta 54, Zagreb 10000, Croatia

[12] INAF Osservatorio Astrofis Arcetri, Largo Enrico Fermi 5, I-50125 Florence, Italy

[13] Space Sci Data Ctr ASI, Via Politecn SNC, I-00133 Rome, Italy

[14] INAF Osservatorio Astron Padova, Vicolo Osservatorio 5, I-35122 Padua, Italy

[15] Leiden Univ, Leiden Observ, Niels Bohrweg 2, NL-2333 CA Leiden, Netherlands

[16] European Space Agcy, European Space Res & Technol Ctr, Keplerlaan 1, NL-2201 AZ Noordwijk, Netherlands

[17] Univ PSL, CNRS, Observ Paris, GEPI, 5 Pl Jules Janssen, F-92190 Meudon, France

[18] Univ Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France

[19] Heidelberg Univ, Zentrum Astron, Astron Rech Inst, Monchhofstr 12-14, D-69120 Heidelberg, Germany

[20] Univ Cote Azur, Observ Cote Azur, Lab Lagrange, CNRS, Bd Observ,CS 34229, F-06304 Nice 4, France

[21] Univ Bordeaux, CNRS, Lab Astrophys Bordeaux, B18N,Allee Geoffroy St Hilaire, F-33615 Pessac, France

[22] Univ Geneva, Dept Astron, Chemin Pegasi 51, CH-1290 Versoix, Switzerland

[23] European Space Agcy, European Space Astron Ctr, Camino Bajo Castillo S-N, Madrid 28692, Spain

[24] European Space Agcy, Aurora Technol, Camino Bajo Castillo S-N, Madrid 28692, Spain

[25] Tech Univ Dresden, Lohrmann Observ, Mommsenstr 13, D-01062 Dresden, Germany

[26] Lund Univ, Lund Observ, Dept Astron & Theoret Phys, Box 43, S-22100 Lund, Sweden

[27] Ctr Spatial Toulouse, CNES, 18 Ave Edouard Belin, F-31401 Toulouse 9, France

[28] Univ Libre Bruxelles, Inst Astron & Astrophys, CP 226,Blvd Triomphe, B-1050 Brussels, Belgium

[29] FRS FNRS, Rue Egmont 5, B-1000 Brussels, Belgium

[30] INAF Osservatorio Astrofis Torino, Via Osservatorio 20, I-10025 Pino Torinese, TO, Italy

[31] European Space Agcy, Noordwijk, Netherlands

[32] Univ Turin, Dept Phys, Via Pietro Giuria 1, I-10125 Turin, Italy

[33] Univ Barcelona IEEC UB, DAPCOM Inst Ciencies Cosmos ICCUB, Marti & Franques 1, Barcelona 08028, Spain

[34] Uppsala Univ, Div Astron & Space Phys, Observat Astrophys, Dept Phys & Astron, Box 516, S-75120 Uppsala, Sweden

[35] ALTEC Spa, Corso Marche 79, I-10146 Turin, Italy

[36] Sednai Sarl, Geneva, Switzerland

[37] Univ Geneva, Dept Astron, Chemin Ecogia 16, CH-1290 Versoix, Switzerland

[38] Univ Coll London, Mullard Space Sci Lab, Dorking RH5 6NT, Surrey, England

[39] ESAC, Gaia DPAC Project Off, Camino Bajo Castillo S-N, Madrid 28692, Spain

[40] European Space Agcy, Telespazio UK SL, Camino Bajo Castillo S-N, Madrid 28692, Spain

[41] Sorbonne Univ, CNRS, Observ Paris, SYRTE,Univ PSL,LNE, 61 Ave Observ, F-75014 Paris, France

[42] Natl Observ Athens, Athens 15236, Greece

[43] Univ Lille, Sorbonne Univ, Observ Paris, IMCCE,Univ PSL,CNRS, 77 Ave Denfert Rochereau, F-75014 Paris, France

[44] European Space Agcy, Serco Gest Negocios, Camino Bajo Castillo S-N, Madrid 28692, Spain

[45] Ctr Rech Astron Astrophys & Geophys, Route Observ Bp 63, Algiers 16340, Algeria

[46] Univ Edinburgh, Inst Astron, Royal Observ, Blackford Hill, Edinburgh EH9 3HJ, Midlothian, Scotland

[47] European Space Agcy, RHEA, Camino Bajo Castillo S-N, Madrid 28692, Spain

[48] European Space Agcy, ATG, Camino Bajo Castillo S-N, Madrid 28692, Spain

[49] Univ Strasbourg, CNRS, UMR 7550, Observ Astron Strasbourg, 11 Rue Univ, F-67000 Strasbourg, France

[50] Kavli Inst Cosmol Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England

来源：

ASTRONOMY & ASTROPHYSICS | 2023年 / 674卷

关键词：

catalogs; surveys; techniques: photometric; techniques: spectroscopic; stars: general; Galaxy: general; MULTIPLE STELLAR POPULATIONS; DIGITAL SKY SURVEY; GALACTIC GLOBULAR-CLUSTERS; STANDARD STARS SURVEY; RED GIANT BRANCH; ASAS-SN CATALOG; H-ALPHA SURVEY; SDSS STRIPE 82; DATA RELEASE; SPECTROSCOPIC BINARY;

D O I：

10.1051/0004-6361/202243709

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Gaia Data Release 3 provides novel flux-calibrated low-resolution spectrophotometry for similar or equal to 220 million sources in the wavelength range 330 nm <= lambda <= 1050 nm (XP spectra). Synthetic photometry directly tied to a flux in physical units can be obtained from these spectra for any passband fully enclosed in this wavelength range. We describe how synthetic photometry can be obtained from XP spectra, illustrating the performance that can be achieved under a range of di fferent conditions - for example passband width and wavelength range - as well as the limits and the problems a ffecting it. Existing top-quality photometry can be reproduced within a few per cent over a wide range of magnitudes and colour, for wide and medium bands, and with up to millimag accuracy when synthetic photometry is standardised with respect to these external sources. Some examples of potential scientific application are presented, including the detection of multiple populations in globular clusters, the estimation of metallicity extended to the very metal-poor regime, and the classification of white dwarfs. A catalogue providing standardised photometry for similar or equal to 2:2 x 10(8) sources in several wide bands of widely used photometric systems is provided (Gaia Synthetic Photometry Catalogue; GSPC) as well as a catalogue of similar or equal to 10(5) white dwarfs with DA /non-DA classification obtained with a Random Forest algorithm (Gaia Synthetic Photometry Catalogue for White Dwarfs; GSPC-WD).

引用

页数：58

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