X-ray sources in globular clusters

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

2004-12-20

arxiv.org/abs/astro-ph/0412524v1

Astronomy and Astrophysics

Astrophysics

Invited review in: "Interacting binaries", July 4-10 Cefalu, eds. Antonelli et al., to be published with AIP. 10 pages,6 figur

Scientific paper

10.1063/1.2130212

Observations with BeppoSAX, RXTE and Chandra suggest that many of the bright X-ray sources in globular clusters have ultrashort binary periods. This is remarkable as such systems are not easily formed. With accurate optical astrometry of HST images, the large numbers of low-luminosity X-ray sources discovered with Chandra can be classified as quiescent low-mass X-ray binaries, pulsars, cataclysmic variables, and magnetically active binaries. The number of cataclysmic variables is found to scale with the number of close stellar encounters.

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