Displacement of X-ray sources from star clusters in starburst galaxies

P. Kaaret, A. Alonso-Herrero, J. S. Gallagher, G. Fabbiano, A. Zezas, M. J. Rieke

Research output: Contribution to journalArticlepeer-review

67 Scopus citations


We examine the spatial offsets between X-ray point sources and star clusters in three starburst galaxies. We find that the X-ray sources are preferentially located near the star clusters. Because the star clusters are very good tracers of the star formation activity in the galaxies, this indicates that the X-ray sources are young objects associated with current star formation. We find significant displacements of the X-ray sources from the clusters. These displacements are likely due to motion of the X-ray sources and indicates that they are X-ray binaries. We find that brighter X-ray sources preferentially occur closer to clusters. The absence of very bright sources at large displacements from clusters may help constrain models of the sources.

Original languageEnglish (US)
Pages (from-to)L28-L32
JournalMonthly Notices of the Royal Astronomical Society
Issue number2
StatePublished - Feb 21 2004


  • Galaxies: individual: M82-galaxies: individual: NGC 1569
  • Galaxies: individual: NGC 5253
  • Galaxies: starburst
  • Galaxies: stellar content
  • X-rays: galaxies

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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