X-rays from old star clusters

Details X-rays from old star clusters X-rays from old star clusters

1999-07-15

arxiv.org/abs/astro-ph/9907202v1

Astronomy and Astrophysics

Astrophysics

10 pages, 6 figures, to be published in: Stellar clusters and associations: Convection, Rotation, and Dynamos, ed. R. Pallavic

Scientific paper

A brief overview is given of X-ray observations of old clusters. Most X-ray sources in old open clusters are interacting binaries, formed via evolution of a primordial binary, and emitting X-rays because of magnetic activity; however, a sizable fraction of the cluster sources is not well understood, including some of the most luminous ones. Globular clusters appear to contain fewer magnetically active X-ray sources than expected if one scales from old open clusters by mass.

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