Hyper-velocity and tidal stars from binaries disrupted by a massive Galactic black hole

Details Hyper-velocity and tidal stars from binaries disrupted by a massive Galactic black hole Hyper-velocity and tidal stars from binaries disrupted by a massive Galactic black hole

Feb 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988natur.331..687h&link_type=abstract

Nature (ISSN 0028-0836), vol. 331, Feb. 25, 1988, p. 687-689.

Astronomy and Astrophysics

Astronomy

165

Binary Stars, Black Holes (Astronomy), Gravitational Effects, Milky Way Galaxy, Stellar Orbits, Companion Stars, Ejection, Stellar Evolution

Scientific paper

A close but newtonian encounter between a tightly bound binary and a 106M_sun; black hole causes one binary component to become bound to the black hole and the other to be ejected at up to 4,000 km s-1. The discovery of even one such hyper-velocity star coming from the Galactic centre would be nearly definitive evidence for a massive black hole. The new companion of the black hole has a high orbital velocity which increases further as its orbit shrinks by tidal dissipation. The gravitational energy released by the orbit shrinkage of such a tidal star can be comparable to its total nuclear energy release.

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