Young supernova remnants

Details Young supernova remnants Young supernova remnants

Aug 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985sciam.253...88s&link_type=abstract

Scientific American (ISSN 0036-8733), vol. 253, Aug. 1985, p. 88-96.

Astronomy and Astrophysics

Astronomy

1

Heao 2, Pulsars, Stellar Mass Accretion, Supernova Remnants, X Ray Sources, X Ray Telescopes, Crab Nebula, Events, Radio Astronomy, Shock Waves, Star Clusters, Synchrotron Radiation

Scientific paper

The X-ray telescope on the orbiting Einstein Observatory satellite was the most effective instrument thus far devised for studying supernova remnants (SNR), which emit radiation most intensely at X-ray wavelengths. SNRs are commonly held to occur only when the nuclear fuel of a star is exhausted. Outward pressing radiation stops, gravity contracts the star and, if it has more than 1.4 solar mass, the collapse leads to a supernova explosion. Type I supernovae are five times as bright as Type II events and last longer. Type II events are usually associated with clusters of bright, new stars, while Type I events have no typical location. The Type II events are thought to arise from stars at least eight times as massive as the sun. Type I SN are posited to result from matter accretion by a companion white dwarf, which reaches 1.4-8 solar masses and passes the Chandrasekhar limit, leading to a SN. Known examples of each, some including pulsars, are discussed.

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