Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008head...10.2907m&link_type=abstract
American Astronomical Society, HEAD meeting #10, #29.07
Astronomy and Astrophysics
Astronomy
Scientific paper
We report a series of XMM-Newton observations of the starburst galaxy IC342. IC342 is a nearby, almost face-on (i=25°±3°), and late-type Sc galaxy in the Maffei Group which is one of the closest groups to our Galaxy. The spiral arms of IC342 are well developed, with moderate star formation activities. IC342 is similar to the Milky Way Galaxy, particularly in the nuclear region where the molecular line emissions have comparable luminosities and size. The face-on orientation of IC342 allows us to study the properties of the point-sources in detail for comparison our galactic counterparts without the interference from the disk. We have combined four XMM-Newton observations taken between 2002 and 2005, and detected 64 X-ray point sources. More than 50% of the detected X-ray point sources show flux variability and about 15% of all sources show spectral transitions on timescales of years. We will focus on the studies of flux variability, spectral characteristics, and classification of the detected sources. This will be the first comprehensive study of the long-term X-ray source properties of IC342.
Kong Albert
Mak Suet-Ying
Pun Chun
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