Stellar collisions and mergers in the cores of globular clusters.

Details Stellar collisions and mergers in the cores of globular clusters. Stellar collisions and mergers in the cores of globular clusters.

Apr 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999phr...311..363s&link_type=abstract

Physics Reports, Vol. 311, No. 3 - 5, p. 363 - 369

Physics

5

Globular Clusters: Stellar Collisions, Globular Clusters: Blue Stragglers, Globular Clusters: Cataclysmic Binaries

Scientific paper

Rare and exotic stars are being discovered with Hubble Space Telescope (HST) observations in large numbers in the cores of globular clusters. Stellar collisions and/or mergers are likely responsible for many of these bizarre objects. The author reviews the theoretical arguments which predict substantial populations of blue stragglers and cataclysmic binaries - the most ubiquitous of globular cluster core exotica. HST observations confirm that blue stragglers are, as predicted, very common. However, dwarf and classical novae appear to be much rarer. A possible explanation for this apparent discrepancy is that most globular cataclysmic binaries are strongly magnetic, and can effectively hide from all but the deepest HST searches.

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