Formation of the Very Large HII Regions Due to the Explosion of the Galactic Center

Details Formation of the Very Large HII Regions Due to the Explosion of the Galactic Center Formation of the Very Large HII Regions Due to the Explosion of the Galactic Center

Dec 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979pthph..62.1584n&link_type=abstract

Progress of Theoretical Physics, Vol. 62, No. 6, pp. 1584-1595

Physics

Scientific paper

The formation of expanding rings in the central regions of galaxies is numerically calculated in the cylindrical coordinate, after galactic explosions with a large mass release (1.2× 108 solar mass). These rings undergo the self-gravitational instability and are led to the fragmentation, which is expected to form very large HII regions in the central parts of some galaxies such as NGC 1068, NGC 1566, NGC 1808, NGC 3256 and others. The radial distance from the center, the mass, and the expansion velocity of massive fragments, which are made by an explosion with the energy of 3× 1056 erg, fit those of the large HII regions in the inner region of NGC 1068. The wind-like explosion is favorable for the instability to grow up during the expansion of the ring.

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