SOME ASPECTS OF THE EVOLUTIONARY HISTORY OF X - RAY DOUBLE STARS
The possibility is examined that the globular cluster X-ray sources are binaries with a compact (neutron star or black hole) component which were formed by direct collisions between compact stars and giant branch stars in the cluster. It is argued that such a collision will lead to capture of the co...
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| Format: | Dissertations |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/787 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | The possibility is examined that the globular cluster X-ray sources are binaries with a compact (neutron star or black hole) component which were formed by direct collisions between compact stars and giant branch stars in the cluster. It is argued that such a collision will lead to capture of the compact star and to the formation of an X-ray binary that may live for some 109 yr. The anticipated number of — 2 x 104 compact stars in the globular cluster M 3 produces a few collisions with giant branch stars in 1012 yr. In the densest globular clusters this frequency can be a few collisions per 1010 yr. Such a frequency is sufficient to explain the observed frequency of occurrence of globular cluster X-ray sources. X-ray sources produced by such collisions are not necessarily to be confined to the central region of the clusters. <br />
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