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Kinematics of multiple stellar populations in Globular Clusters with Gaia

Published online by Cambridge University Press:  11 March 2020

G. Cordoni Open the ORCID record for G. Cordoni [Opens in a new window] ,
A. P. Milone Open the ORCID record for A. P. Milone [Opens in a new window] ,
A. Mastrobuono-Battisti Open the ORCID record for A. Mastrobuono-Battisti [Opens in a new window] ,
A. F. Marino Open the ORCID record for A. F. Marino [Opens in a new window] ,
E. P. Lagioia Open the ORCID record for E. P. Lagioia [Opens in a new window]  and
M. Tailo Open the ORCID record for M. Tailo [Opens in a new window]
G. Cordoni
Affiliation:
Dipartimento di Fisica e Astronomia “Galileo Galilei” - Univ. di Padova Vicolo dell’Osservatorio 3, Padova, IT-35122
A. P. Milone
Affiliation:
Dipartimento di Fisica e Astronomia “Galileo Galilei” - Univ. di Padova Vicolo dell’Osservatorio 3, Padova, IT-35122
A. Mastrobuono-Battisti
Affiliation:
Max-Planck Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany
A. F. Marino
Affiliation:
Dipartimento di Fisica e Astronomia “Galileo Galilei” - Univ. di Padova Vicolo dell’Osservatorio 3, Padova, IT-35122 Centro di Ateneo di Studi e Attività Spaziali “Giuseppe Colombo” - CISAS Via Venezia 15, Padova, IT-35131
E. P. Lagioia
Affiliation:
Dipartimento di Fisica e Astronomia “Galileo Galilei” - Univ. di Padova Vicolo dell’Osservatorio 3, Padova, IT-35122
M. Tailo
Affiliation:
Dipartimento di Fisica e Astronomia “Galileo Galilei” - Univ. di Padova Vicolo dell’Osservatorio 3, Padova, IT-35122
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Abstract

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The internal dynamics of multiple stellar populations in Globular Clusters (GCs) provides unique constraints on the physical processes responsible for their formation. Specifically, the present-day kinematics of cluster stars, such as rotation and velocity dispersion, seems to be related to the initial configuration of the system. In recent work (Milone et al. 2018), we analyzed for the first time the kinematics of the different stellar populations in NGC 0104 (47 Tucanae) over a large field of view, exploiting the Gaia Data Release 2 proper motions combined with multi-band ground-based photometry. In this paper, based on the work by Cordoni et al. (2019), we extend this analysis to six GCs, namely NGC 0288, NGC 5904 (M 5), NGC 6121 (M 4), NGC 6752, NGC 6838 (M 71) and further explore NGC 0104. Among the analyzed clusters only NGC 0104 and NGC 5904 show significant rotation on the plane of the sky. Interestingly, multiple stellar populations in NGC 5904 exhibit different rotation curves.

Keywords

globular clusters: generalstars: population IIstars: abundancesdynamics
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S351: Star Clusters: From the Milky Way to the Early Universe , May 2019 , pp. 281 - 284
Copyright
© International Astronomical Union 2020

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