Jackson, RJ, Jeffries, RD ORCID: https://orcid.org/0000-0001-5668-1288, Wright, NJ ORCID: https://orcid.org/0000-0002-8389-8711, Randich, S, Sacco, G, Bragaglia, A, Hourihane, A, Tognelli, E, Degl'Innocenti, S, Moroni, PGP, Gilmore, G, Bensby, T, Pancino, E, Smiljanic, R, Bergemann, M, Carraro, G, Franciosini, E, Gonneau, A, Jofré, P, Lewis, J, Magrini, L, Morbidelli, L, Prisinzano, L, Worley, C, Zaggia, S, Tautvaišiene, G, Albarrán, MLG, Montes, D and Jiménez-Esteban, F (2021) The Gaia-ESO Survey: Membership probabilities for stars in 63 open and 7 globular clusters from 3D kinematics. Monthly Notices of the Royal Astronomical Society.

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Abstract

Spectroscopy from the final internal data release of the Gaia-ESO Survey (GES) has been combined with Gaia EDR3 to assign membership probabilities to targets observed towards 63 Galactic open clusters and 7 globular clusters. The membership probabilities are based chiefly on maximum likelihood modelling of the 3D kinematics of the targets, separating them into cluster and field populations. From 43211 observed targets, 13985 are identified as highly probable cluster members ($P>0.9$), with an average membership probability of 0.993. The addition of GES radial velocities successfully drives down the fraction of false positives and we achieve better levels of discrimination in most clusters over the use of astrometric data alone, especially those at larger distances. Since the membership selection is almost purely kinematic, the union of this catalogue with GES and Gaia is ideal for investigating the photometric and chemical properties of clusters as a function of stellar mass, age and Galactic position.

Item Type: Article
Additional Information: © 2021 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model) Any other relevant information required for this article can be found on the publisher website at; https://academic.oup.com/mnras/advance-article-abstract/doi/10.1093/mnras/stab3032/6414548?redirectedFrom=fulltext
Subjects: Q Science > Q Science (General)
Q Science > QA Mathematics
Q Science > QB Astronomy
Q Science > QB Astronomy > QB600 Planets. Planetology
Q Science > QB Astronomy > QB799 Stars
Divisions: Faculty of Natural Sciences > School of Chemical and Physical Sciences
Related URLs:
Depositing User: Symplectic
Date Deposited: 04 Nov 2021 13:05
Last Modified: 04 Nov 2021 13:05
URI: https://eprints.keele.ac.uk/id/eprint/10220

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