Computer Science
Scientific paper
Dec 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999sf99.proc...78a&link_type=abstract
Star Formation 1999, Proceedings of Star Formation 1999, held in Nagoya, Japan, June 21 - 25, 1999, Editor: T. Nakamoto, Nobeyam
Computer Science
Scientific paper
Supershells produced by multiple supernova explosions can play an important role in replenishing heavy elements, hot gas and kinetic energy into the Galactic halo, and influencing thereby the Galactic evolution. We have made extensive observations of the 2.6 mm 12CO emission in the direction of the Carina arm, and discovered molecular cloud complex located at unusually far above the Galactic plane. This molecular cloud complex shows clear evidence for a supershell as follows; (i) the velocity distribution of the molecular clouds is well explained by an expanding shell, (ii) the IRAS 100 μm and HI maps exhibit shell-like distribution delineated by the present CO distribution, and (iii) supernova explosions are in fact evidenced by the soft X-ray emission detected with the ROSAT bounded by the half of the shell structure. This supershell is unique in the sense that it is exhibiting evidence for formation of massive molecular clouds and massive stars in them far above the Galactic plane. Such supershells may be found in external galaxies including the Magellanic Clouds, but have never been clearly identified in the Galaxy.
Abe Rihei
Fukui Yasuo
Kawamura Akiko
Mizuno Akira
Onishi Tatsuo
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