Why are there no type II supernovae in irregular galaxies?

Details Why are there no type II supernovae in irregular galaxies? Why are there no type II supernovae in irregular galaxies?

Oct 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984pazh...10..723s&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 10, Oct. 1984, p. 723-725) Soviet Astronomy Letters (ISSN 0360-0327), vol. 10, Sept.-Oc

Astronomy and Astrophysics

Astronomy

4

Galaxies, Magellanic Clouds, Supernovae, Giant Stars, Heavy Elements, Hot Stars, Hydrogen Clouds, Molecular Clouds, Stellar Winds

Scientific paper

The conclusion is drawn that the reason for an absence of type II supernovae explosions in irregular galaxies is their peculiar chemical composition. The observed lack of stellar wind from massive hot giants is due to relatively low heavy element abundance. For this reason evolving massive stars do not form an extended dense envelope which is a necessary condition for the type II supernova phenomenon.

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