Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009cfdd.confe.137k&link_type=abstract
Chandra's First Decade of Discovery, Proceedings of the conference held 22-25 September, 2009 in Boston, MA. Edited by Scott Wo
Astronomy and Astrophysics
Astrophysics
Galaxies
Scientific paper
It has long been known that the X-ray emission in late-type spiral disks is dominated by star-formation. Astrophysical consideration leads one to believe that the X-ray emission must be dominated by supernovae, as massive star winds are orders of magnitude weaker. However, direct observation of nearby galaxies show that the bulk of diffuse X-ray emission is not due to identifiable supernova remnants. Is the diffuse emission due to correlated supernovae forming rather amorphous bubbles, is it due to gas than has expanded into the halo, or is it due to highly distributed supernova that quickly lose their identity? To address this issue I have done a more careful analysis of the M101 (and M33) VLP data to 1) place stronger limits on the contributions to the diffuse emission from stars, binaries, and SNR 2) place limits on the amount of emission not correlated with star-formation. The X-ray emission has a strong non-linear global correlation with the FUV suggesting that the X-ray emission is due to the current supernova rate, but more local correlations show that this may not be the case.
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