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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/28822
Title: The eye of Gaia on globular clusters kinematics: internal rotation
Authors: SOLLIMA, ANTONIO LUIGI 
Baumgardt, H.
Hilker, M.
Issue Date: 2019
Journal: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 
Number: 485
Issue: 1
First Page: 1460
Abstract: We derived the three-dimensional velocities of individual stars in a sample of 62 Galactic globular clusters using proper motions from the second data release of the Gaia mission together with the most comprehensive set of line-of-sight velocities with the aim of investigating the rotation pattern of these stellar systems. We detect the unambiguous signal of rotation in 15 clusters at amplitudes which are well above the level of random and systematic errors. For these clusters, we derived the position and inclination angle of the rotation axis with respect to the line of sight and the overall contribution of rotation to the total kinetic energy budget. The rotation strengths are weakly correlated with the half-mass radius, the relaxation time, and anticorrelated with the destruction rate, while no significant alignment of the rotation axes with the orbital poles has been observed. This evidence points towards a primordial origin of the systemic rotation in these stellar systems.
URI: http://hdl.handle.net/20.500.12386/28822
URL: https://academic.oup.com/mnras/article/485/1/1460/5342080
ISSN: 0035-8711
DOI: 10.1093/mnras/stz505
Bibcode ADS: 2019MNRAS.485.1460S
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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