The dynamics of an extremely young cluster probed for the first time

Details The dynamics of an extremely young cluster probed for the first time The dynamics of an extremely young cluster probed for the first time

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010iaus..266..386d&link_type=abstract

Star clusters: basic galactic building blocks throughout time and space, Proceedings of the International Astronomical Union, IA

Astronomy and Astrophysics

Astronomy

Stars: Distances, Stars: Kinematics, Stars: Evolution, Stars: Formation

Scientific paper

We present a proper-motion program that we have developed at ESO to measure, for the first time, proper motions of members of the nearby (125 pc), very young (4 × 105 yr) infrared ρ Ophiuchi cluster. Repeated imaging over an extended period will allow us to measure the global proper motion of the cluster and its velocity dispersion and will provide access to the ~ 1 km s-1 velocities for objects as faint as K = 15.7 mag. Access to the velocity field of such an extremely young cluster is of crucial importance to investigate the origin and early evolution of open cluster systems.

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