High resolution kinematics of galactic globular clusters. I.
S. Zaggia, M. Capaccioli, G. Piotto, M. Stiavelli
Abstract
S. Zaggia, M. Capaccioli, G. Piotto, M. Stiavelli
Abstract
Integrated central velocity dispersions are presented for 7 globular clusters, three of which known to be post core-collapsed. The statistical significance of the measurements is discussed. For one of the clusters, M 30, radial velocities of 16 stars, which help mapping the inner velocity dispersion profile, are provided. These data suggest that M30 has more likely an isothermal core, at variance with the behaviour of its closest twin M 15
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Integrated central velocity dispersions are presented for 7 globular clusters, three of which known to be post core-collapsed. The statistical significance of the measurements is discussed. For one of the clusters, M 30, radial velocities of 16 stars, which help mapping the inner velocity dispersion profile, are provided. These data suggest that M30 has more likely an isothermal core, at variance with the behaviour of its closest twin M 15
Key concepts: Globular cluster, Physics, Astrophysics, Velocity dispersion, Stars, Kinematics, Radial velocity, Astronomy