Three-Component Kinematics of Multiple Stellar Populations in Globular Clusters with Gaia and VLT

Abstract

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, could be related to the initial configuration of the system. In recent work, we provided the first study of the kinematics of different stellar populations in NGC0104 over a large field of view in the plane of the sky, exploiting Gaia Data Release 2 (DR2) proper motions combined with multi-band ground-based photometry. In this paper, we combine Gaia DR2 proper motions with Very Large Telescope radial velocities to investigate the kinematics along the line of sight and in the plane of the sky of multiple populations in seven GCs, namely NGC0104, NGC0288, NGC5904, NGC6121, NGC6254, NGC6752 and NGC6838. Among the analyzed clusters only NGC0104 and NGC5904 show significant rotation. Separating our sample into two groups of first- and second-population stars (1P and 2P) we find that overall these two populations exhibit a similar rotation pattern in NGC0104. However, some hints of different rotation are observed in the external regions of this cluster. Interestingly, 1P and 2P stars in NGC5904 show different rotation curves, with distinct phases and such difference is significant at the $\sim$2.5-$\sigma$ level. The analysis of the velocity-dispersion profiles of multiple populations confirms that 2P stars of NGC0104 show stronger anisotropy than the 1P.

Accepted for publication in ApJ, 22 pages, 15 figures, 3 tables

References in corpus (15)

• Fast rotating massive stars and the origin of the abundance patterns in galactic globular clusters
• The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. IX. The Atlas of Multiple Stellar Populations
• A stellar census in globular clusters with MUSE: The contribution of rotation to cluster dynamics studied with 200 000 stars
• Homogeneous photometry VII. Globular clusters in the Gaia era
• The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. XIX. A Chemical Tagging of the Multiple Stellar Populations Over the Chromosome Maps
• The eye of Gaia on globular clusters kinematics: internal rotation
• Extended main sequence turnoff as a common feature of Milky Way open clusters
• Multiple populations in globular clusters: the distinct kinematic imprints of different formation scenarios
• The Rotation of Sub-Populations in omega Centauri
• Differences in the rotational properties of multiple stellar populations in M 13: a faster rotation for the "extreme" chemical subpopulation
• The halo+cluster system of the Galactic globular cluster NGC1851
• Systematic errors in Gaia DR2 astrometry and their impact on measurements of internal kinematics of star clusters
• The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. XVIII. Proper-motion kinematics of multiple stellar populations in the core regions of NGC 6352
• Kinematical evolution of multiple stellar populations in star clusters
• Multiple stellar populations of globular clusters from homogeneous Ca-Cn photometry. II. M5 (NGC 5904) and a new filter system

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