Gaia Data Release 3 Validating the classification of variable young stellar object candidates

被引：15

作者：

Marton, Gabor ^{[1
,2
]}

Abraham, Peter ^{[1
,2
,3
]}

Rimoldini, Lorenzo ^{[5
]}

Audard, Marc ^{[5
,6
]}

Kun, Maria ^{[1
,2
]}

Nagy, Zsofia ^{[1
,2
]}

Kospal, Agnes ^{[1
,2
,3
,4
]}

Szabados, Laszlo ^{[1
,2
]}

Holl, Berry ^{[5
,6
]}

Gavras, Panagiotis ^{[7
]}

Mowlavi, Nami ^{[5
,6
]}

Nienartowicz, Krzysztof ^{[8
]}

de Fombelle, Gregory Jevardat ^{[5
]}

Lecoeur-Taibi, Isabelle ^{[5
]}

Karbevska, Lea ^{[5
,9
]}

Lario, Pedro Garcia ^{[10
]}

Eyer, Laurent ^{[6
]}

机构：

[1] Eotvos Lorand Res Network ELKH, Konkoly Observ, Res Ctr Astron & Earth Sci, Konkoly Thege Miklos Ut 15-17, H-1121 Budapest, Hungary

[2] CSFK, MTA Ctr Excellence, Budapest Konkoly Thege Miklos Ut 15-17, H-1121 Budapest, Hungary

[3] Eotvos Lorand Univ, Inst Phys, Pazmany Peter Setany 1-A, H-1117 Budapest, Hungary

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

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

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

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

[8] Sednai Sarl, Geneva, Switzerland

[9] Univ Caen Normandie, Cote Nacre Blvd Marechal Juin, F-14032 Caen, France

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

来源：

ASTRONOMY & ASTROPHYSICS | 2023年 / 674卷

基金：

欧洲研究理事会; 欧盟地平线“2020”; 瑞士国家科学基金会;

关键词：

catalogs; stars: early-type; Galaxy: stellar content; stars: formation; stars: pre-main sequence; stars: statistics; RR LYRAE STARS; MOLECULAR CLOUDS; ALLWISE CATALOG; OGLE COLLECTION; IDENTIFICATION; ORION; MIRA; VARIABILITY; GALAXIES; OUTBURST;

D O I：

10.1051/0004-6361/202244101

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Context. The Gaia third Data Release (DR3) presents the first catalogue of full-sky variable young stellar object (YSO) candidates observed by the Gaia space telescope during the initial 34 months of science operations. Aims. Numerous types of variable stars were classified using photometric data collected by Gaia. One of the new classes presented in the Gaia DR3 is the class of YSOs showing brightness variability. We analysed 79 375 sources classified as YSO candidates in order to validate their young nature and investigate the completeness and purity of the sample. Methods. We cross-matched the Gaia DR3 YSO sample with numerous catalogues from the literature, including YSO catalogues based on optical and infrared data, as well as catalogues of extragalactic sources and Galactic variable stars. YSO catalogues were used to quantify the completeness of the Gaia DR3 YSO sample, while others were inspected to calculate the contamination. Results. Among the 79 375 potential YSO candidates published in the Gaia DR3 variable star catalogue, the majority of these objects are distributed along the line of sight of well-known star forming regions and the Galactic midplane. We find that the upper limit of contamination is 26.7%, depending on the external catalogue used for the estimation, but find an average of similar to 10% in general, while the completeness is at the percent level, taking into account that the Gaia DR3 YSO sample is based on sources that showed significant variability during the data-collection period. The number of sources in our sample that had not previously been catalogued as YSO candidates is similar to 40 000 objects.

引用

页数：21

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