Chandra Observations of the HII Regions in M33

Details Chandra Observations of the HII Regions in M33 Chandra Observations of the HII Regions in M33

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001tysc.confe.125m&link_type=abstract

Two Years of Science with Chandra, Abstracts from the Symposium held in Washington, DC, 5-7 September, 2001, meeting abstract.

Computer Science

Normal Galaxies

Scientific paper

We present preliminary Chandra observations of the X-ray emission from the brightest star formation regions in M33 In many cases the images are taken far off-axis where the point spread function is up to 10 arcseconds across, and so only hint at the detail which will be visible in targeted observations. The nearby, relatively face-on galaxy M33, which is forming stars at a rate of about 0.3 Msun/yr, is rich in complex emission nebulae, dominated by the giant HII region NGC 604, which is seen as an extended soft X-ray nebula in the Chandra data. Our initial conclusion is that diffuse, hot X-ray emitting gas is present in at least some of the M33 HII regions. However, the observed X-ray to optical flux ratio of these HII regions varies widely. We cannot yet determine to what extent this variation is due to extinction versus intrinsic processes.

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