Mathematics – Logic
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...200.3307w&link_type=abstract
American Astronomical Society, 200th AAS Meeting, #33.07; Bulletin of the American Astronomical Society, Vol. 34, p.688
Mathematics
Logic
Scientific paper
I will review recent results from X-ray observations of hot gaseous halos around nearby edge-on disk galaxies. We have detected a giant diffuse X-ray-emitting corona around the galactic disk of NGC 4631. Extraplanar diffuse X-ray emission is also detected around NGC 3556. These X-ray-emitting coronae morphologically resemble the radio halos of these galaxies, indicating a close connection between outflows of hot gas, cosmic rays, and magnetic field from the galactic disks. There is also marginal evidence for extraplanar diffuse X-ray emission in NGC 4244 --- a galaxy with an extremely low star formation rate. In general, the extraplanar diffuse X-ray emission is evidently related to recent massive star forming activities in the galactic disks, especially in their central regions.
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