New observational data on supernovae

Mathematics – Logic

Scientific paper

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Galactic Structure, Stellar Evolution, Supernovae, Classifications, Cosmology, Galactic Clusters, Light Curve, Pulsars

Scientific paper

Observational data acquired on supernovae since 1969 are reviewed. Classifications of supernovae are discussed, the possibility of combining types II and III is considered, relationships between pre-supernova objects and pulsars are discussed, and an attempt is made to relate supernovae to galactic components, stellar population types, and clusters of galaxies. Interpretations of type I supernova spectra are reviewed. Some 390 supernova and 35 objects suspected as such are on record as of 1973, and of these about 100 figure in the local galaxy. Statistics on the frequency of supernova outbursts in different types of galaxies point to type Sc I galaxies as the most likely hosts for supernovae. Supernovae show up less frequently in faint galaxies than in bright galaxies. Supernovae are considered as possible distance indicators, and related cosmological and evolutionary aspects are discussed.

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