The Gaia-ESO Survey: membership probabilities for stars in 32 open clusters from 3D kinematics

被引：27

作者：

Jackson, R. J. ^{[1
]}

Jeffries, R. D. ^{[1
]}

Wright, N. J. ^{[1
]}

Randich, S. ^{[2
]}

Sacco, G. ^{[2
]}

Pancino, E. ^{[2
]}

Cantat-Gaudin, T. ^{[3
]}

Gilmore, G. ^{[4
]}

Vallenari, A. ^{[5
]}

Bensby, T. ^{[6
]}

Bayo, A. ^{[7
,10
]}

Costado, M. T. ^{[8
]}

Franciosini, E. ^{[2
]}

Gonneau, A. ^{[4
]}

Hourihane, A. ^{[4
]}

Lewis, J. ^{[4
]}

Monaco, L. ^{[9
]}

Morbidelli, L. ^{[2
]}

Worley, C. ^{[4
]}

机构：

[1] Keele Univ, Astrophys Grp, Keele ST5 5BG, Staffs, England

[2] INAF, Osservatorio Astrofisco Arcetri, Largo E Fermi 5, I-50125 Florence, Italy

[3] Univ Barcelona IEEC UB, Inst Ciencies Cosmos, Marti & Franques 1, E-08028 Barcelona, Spain

[4] Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0H, England

[5] Osserv Astron Padova, INAF, Vicolo Osservaiorio 5, I-35122 Padua, Italy

[6] Land Observ, Dept Astron & Theoret Phys, Box 43, SE-22100 Lund, Sweden

[7] Univ Valparaiso, Fac Ciencias, Inst Fis & Astron, Av Gran Bretana 1111,5030 Casilla, Valparaiso, Chile

[8] Univ Cddiz, Dept Didact, E-11519 Puerto Real, Cadiz, Spain

[9] Univ Andres Bello, Dept Ciencias Fis, Fernandez Concha 700, Santiago, Chile

[10] Univ Valparai, Nucleo Milenio Formac Planetaria NPF, Ave Errazuriz 1834, Valparaiso, Chile

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2020年 / 496卷 / 04期

基金：

英国科学技术设施理事会;

关键词：

stars: evolution; stars: pre-main-sequence; open clusters and associations: general; LITHIUM DEPLETION BOUNDARY; BROWN DWARF CANDIDATES; GAMMA VELORUM CLUSTER; BETA CCD PHOTOMETRY; H-ALPHA PHOTOMETRY; LOW-MASS STARS; STELLAR POPULATION; CHAMELEON-I; DISTANCE; FIELD;

D O I：

10.1093/mnras/staa1749

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Gaia-ESO Survey (GES) observed many open clusters as part of its programme to spectroscopically characterize the various MilkyWay populations. GES spectroscopy and Gaia astrometry from its second data release are used here to assign membership probabilities to targets towards 32 open clusters with ages from 1 to 3800 Myr, based on maximum likelihood modelling of the 3D kinematics of the cluster and field populations. From a parent catalogue of 14 398 individual targets, 5032 stars with uniformly determined 3D velocities, T-eff, logg, and chemistry are assigned cluster membership with probability >0.9, and with an average probability of 0.991. The robustness of the membership probabilities is demonstrated using independent membership criteria (lithium and parallax) in two of the youngest clusters. The addition of radial velocities improves membership discrimination over proper motion selection alone, especially in more distant clusters. The kinematically selected nature of the membership lists, independent of photometry and chemistry, makes the catalogue a valuable resource for testing stellar evolutionary models and investigating the time evolution of various parameters.

引用

页码：4701 / 4716

页数：16

共 35 条

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