Cause of the peculiarity of the Crab Nebula

Details Cause of the peculiarity of the Crab Nebula Cause of the peculiarity of the Crab Nebula

Aug 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976azh....53..750s&link_type=abstract

Astronomicheskii Zhurnal, vol. 53, July-Aug. 1976, p. 750-754. In Russian.

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2

Crab Nebula, Flow Velocity, Gas Expansion, Supernova Remnants, Filaments, Kinetic Energy, Stellar Evolution, Synchrotron Radiation, White Dwarf Stars

Scientific paper

It is argued that the anomalously low expansion velocity of the Crab Nebula's filaments is the cause of all the observed peculiarities of this supernova remnant. It is shown that the 'evolutionary age' of the Crab Nebula is very small, that this remnant is the youngest known object of its type, and that the kinetic energy of the shell of the supernova in 1054 was at least several tens of times less than that of other remnants. Possible reasons for the low kinetic energy are discussed in relation to the problem of the nature of supernovae. In particular, it is hypothesized that type I 'presupernovae' should be highly evolved objects, such as white dwarfs.

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