Association of type II supernovae with giant H II regions The case of M 83 and M 101

Details Association of type II supernovae with giant H II regions The case of M 83 and M 101 Association of type II supernovae with giant H II regions The case of M 83 and M 101

Nov 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...140l...1r&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 140, no. 1, Nov. 1984, p. L1-L4.

Astronomy and Astrophysics

Astrophysics

29

H Ii Regions, Spiral Galaxies, Stellar Evolution, Supernovae, Position (Location), Stellar Mass, Supernova Remnants

Scientific paper

First results are reported of a statistical study of the association of type II supernovae with H II regions. Using the most accurate positions for the supernovae in the galaxies M 83 and M 101, a strong correlation is found between SNe II and giant H II regions. The association with H II regions implies very high initial masses (50 to 120 solar masses) for the progenitors of these type II supernovae. The estimated Lyman continuum flux in M 101 combined with a reasonable initial mass function yields a total number of stars in this mass range which is consistent with the observed supernova frequency. The diversity of observed optical and radio properties of extragalactic type II supernovae is a likely consequence of the large range in progenitor masses, the different evolutionary histories of the progenitors and the difference in environmental conditions for supernovae exploding in H II regions. The evidence from extragalactic supernova events suggests that most of the supernova remnants seen in H II regions in the Galaxy, the LMC, and M 33, originated from type II supernovae.

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