Abstract
Fewer and further between
Highlights
THE rate at which supernova explosions occur enters into our models of galactic evolution, interstellar gas dynamics and other phenomena
What rates should we be using? The answer from van den Bergh et at.' applies to galaxies in the Shapley-Ames Catalog', which contains a mix of types but is dominated by spirals rather like our Milky
The authors divide the 1.8h'supernovae among 1.1 h'type II, 0.3 h2 type Ia, and 0.4 h' type Ib per century per 1010 L"c!'
Summary
THE rate at which supernova explosions occur enters into our models of galactic evolution , interstellar gas dynamics and other phenomena. Conclude' van den Bergh, McClure and Evans on the basis of systematic searches for supernovae in bright southern galaxies by Australian amateur The answer from van den Bergh et at.' applies to galaxies in the Shapley-Ames Catalog' , which contains a mix of types but is dominated by spirals rather like our Milky
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