Populations of X-ray binaries and the dynamical history of their host galaxies

Details Populations of X-ray binaries and the dynamical history of their host galaxies Populations of X-ray binaries and the dynamical history of their host galaxies

2001-03-11

arxiv.org/abs/astro-ph/0103157v2

Astronomy and Astrophysics

Astrophysics

accepted for publication in Publ. Astron Soc. Australia, text is revised

Scientific paper

10.1071/AS01055

The observed luminosity distributions of X-ray sources indicate the presence of several populations of X-ray binaries in the nearby galaxies. Each population has its formation and evolutionary history, depending on the host environment. The features seen in the log N($>$S) -- log S curves for different types of galaxies and for different galactic components can be reproduced by a birth-death model, in which the lifespans of the binaries are inversely proportional to their X-ray brightness. Conversely, the dynamical history of a galaxy can be inferred from the luminosity distributions of its X-ray binary populations.

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