Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.8701p&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #87.01; Bulletin of the American Astronomical Society, V
Astronomy and Astrophysics
Astronomy
Scientific paper
The Chandra ACIS Survey of M33 (ChASeM33) is a Very Large Project with the Chandra X-ray Observatory to observe the inner regions of M33, the nearest roughly face-on spiral galaxy. The ChASeM33 survey, which covers the majority of the area inside the D25 isophote, provides an unprecedented view in X-rays of the hot phase of the Interstellar Medium (ISM), the Supernova Remnant (SNR) population, and the point source population of M33. Chandra provides the highest angular resolution yet achieved in X-ray astronomy ( 1 arcsecond), resulting in a limiting luminosity for point sources in this survey of 1e35 ergs/s in the 0.5-7.0 keV bandpass. The survey consists of 14 pointings of 100 ks each at seven fields in the galaxy, such that each field is observed twice roughly one year apart. We briefly discuss the technical challenges of combining a large dataset with multiple, overlapping Chandra observations. We present mosaic images of the survey data in three bands, ``total'' (0.5-8.0 keV), ``soft'' (0.5-2.0 keV), and ``hard'' (2.0-8.0 keV), and an X-ray ``true-color'' image. These mosaic images are compared to the optical, UV, and radio images of M33 to identify large features in the ISM such as evolved SNRs, large HII regions, and superbubbles. For two of the largest HII regions in the galaxy, NGC 604 and IC 131, the Chandra data resolve structure within the HII regions and identify significant spectral variations within the regions. Adjacent posters in this session will present more details on the point source population, the SNR population, and the brightest SNR in M33.
This work was supported by NASA Chandra award number G06-7073A and by NASA contract NAS8-03060.
Bianchi Luciana
Blair William Patrick
Breitschwerdt Dieter
de Avillez Miguel A.
Edgar Richard J.
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