Astronomy and Astrophysics – Astronomy
Scientific paper
May 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21822829a&link_type=abstract
American Astronomical Society, AAS Meeting #218, #228.29; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
We present an investigation of the connection between spatially resolved star-formation and the young ( Myr) X-ray Binary (XRB) populations in the Small and the Large Magellanic Clouds, our two nearest star-forming galaxies, using X-ray and optical photometric and spectroscopic data. For the Small Magellanic Cloud we find that the High-Mass XRBs are observed in regions with star-formation rate bursts 25-60 Myr ago, while for the Large Magellanic Cloud we find that these populations are concentrated in regions as young as 13-50 Myr. The similarity of this age with the age of maximum occurrence of the Be phenomenon ( 40 Myr) indicates that the presence of a circumstellar decretion disk plays a significant role in the number of observed XRBs in the 10-100 Myr age range. We discuss the effect of age and metallicity in the relative number of Be-XRBs in the two galaxies in comparison with the Milky Way, and with predictions of population synthesis models for sub-solar metallicity galaxies.
Antoniou Vallia
Kalogera Vassiliki
Zezas Andreas
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