Dynamical effects on binary X-ray sources in dense stellar clusters

Details Dynamical effects on binary X-ray sources in dense stellar clusters Dynamical effects on binary X-ray sources in dense stellar clusters

Jul 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...231..534s&link_type=abstract

Astrophysical Journal, Part 1, vol. 231, July 15, 1979, p. 534-538.

Astronomy and Astrophysics

Astronomy

13

Astronomical Models, Binary Stars, Globular Clusters, Star Clusters, Stellar Evolution, X Ray Sources, Black Holes (Astronomy), Gravitational Fields, Mass Transfer, Neutron Stars

Scientific paper

We examine the model in which the globular-cluster X-ray sources are binaries. Collisions of field stars in cores of dense clusters may shrink the orbits of tightly bound ('hard') binaries, with important consequences for the evolution of X-ray sources if one component is a collapsed star. Exchange capture of field stars enables the binary to recycle its mass supplier and to undergo a number of intermittent stages of X-ray activity. 'Hard' binaries may be formed by three-body encounters or by two-body tidal capture in clusters with large core densities and low velocity dispersions. Alternatively, as suggested by Hills, such objects may form by neutron-star or black-hole capture in exchange collisions with primordial binaries.

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