X-ray sources in globular clusters

Details X-ray sources in globular clusters X-ray sources in globular clusters

2001-11-22

arxiv.org/abs/astro-ph/0111439v1

Astronomy and Astrophysics

Astrophysics

10 pages, 5 figures, for pulbication in Jan van Paradijs Memorial Symposium ASP Conf.Ser., eds. Van den Heuvel, Kaper, Rol

Scientific paper

The twelve bright (Lx>10(36) erg/s) X-ray sources in the globular clusters have lower luminosities than the brightest sources in the bulge of our galaxy. The dim (Lx<10(35) erg/s) X-ray sources in globular clusters reach higher luminosities than the cataclysmic variables in the disk of our galaxy. The first difference is a statistical fluke, as comparison with M31 indicates. The second difference is explained because the brightest of the dim sources are not cataclysmic variables, but soft X-ray transients in quiescence. This article describes the BeppoSAX, ROSAT and first Chandra observations leading to these conclusions.

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