Models for the evolution of X-ray binaries in a young stellar population

M. Eracleous, M. S. Sipior, S. Sigurdsson, Ivanova, Zezas, Lipunov

Research output: Contribution to journalArticle

Abstract

We present the results of population synthesis simulations aimed at exploring the evolution of the 2-10 keV luminosity of X-ray binaries in a young stellar population. The results are applicable to populations of extragalactic X-ray binaries in starburst galaxies and many LINERs. We find that the integrated 2-10 keV luminosity of the simulated population reaches a maximum of about 1040 erg s-1 after approximately 20 Myr (for a star-formation rate of 10 M yr-1) and remains significant even after the end of star formation and the demise of the luminous OB stars. The results of our simulation are in agreement with recently-derived correlations between the X-ray luminosity starburst galaxies and their star-formation rate. We also find that the cumulative luminosity function is initially fairly flat, in agreement with recent observational results, becoming steeper as the population ages and the high-mass X-ray binaries are succeeded by binaries with progressively lighter donor stars. Using the output of Hydrogen-ionizing far-UV photons from the stellar population, we can plot the track of a "post-starburst" system in the Lx-LIIα diagram. The system starts off in the starburst locus but quickly evolves to the AGN locus where it lingers for at least 1 Gyr.

Original languageEnglish (US)
Pages (from-to)417-421
Number of pages5
JournalProceedings of the International Astronomical Union
Volume1
Issue numberS230
DOIs
StatePublished - Jan 1 2005

All Science Journal Classification (ASJC) codes

  • Medicine (miscellaneous)
  • Astronomy and Astrophysics
  • Nutrition and Dietetics
  • Public Health, Environmental and Occupational Health
  • Space and Planetary Science

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