Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-12-21
Mon.Not.Roy.Astron.Soc. 348 (2004) L28
Astronomy and Astrophysics
Astrophysics
to appear in MNRAS letters, 5 pages, figure 1 is in color, astro-ph version is low resolution
Scientific paper
10.1111/j.1365-2966.2004.07516.x
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.
Alonso-Herrero Almudena
Fabbiano Giuseppina
Gallagher Jay S.
Kaaret Phil
Rieke Marcia J.
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