One more space motion of a globular cluster - NGC 4147

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Astronomical Models, Globular Clusters, Stellar Motions, Stellar Orbits, Angular Momentum, Milky Way Galaxy

Scientific paper

From measurements of 39 stars with respect to the extragalactic Lick reference system, the authors derived the absolute proper motion of NGC 4147 and - using in addition the radial velocity - the space velocity with respect to various standards. The membership of individual stars of special astrophysical interest is discussed. Parameters of the cluster's galactic orbit are presented together with those of the previously treated cluster NGC 5466. Among these, the relatively low angular momenta seem to be especially remarkable.

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