Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1970
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1970ap%26ss...9..315t&link_type=abstract
Astrophysics and Space Science, Volume 9, Issue 2, pp.315-331
Astronomy and Astrophysics
Astrophysics
15
Scientific paper
General models for the secular behavior of the radio and X-ray emission from supernova remnants are examined and compared with the observations. Hot plasma and synchrotron models for the X-ray emission are considered. Among other things, it is concluded that (1) the total kinetic energy released in most supernova outbursts is probably less than about 1051 ergs; (2) continuous injection probably occurs for at least 10 yr in every case and about 1000 yr in most supernova remnants, in which case the supernova remnants 3C392, W28, Pup A and IC443 should produce 1 10 keV X-ray fluxes ≈ 10-10 ergs/cm2 sec; and (3) the X-ray sources in the Crab Nebula, Cas A and Tycho can be explained in terms of a model wherein continuous injection occurs for 300 yr for the Crab Nebula, much less than 250 yr for Cas A and much longer than 400 yr for Tycho. Finally, it is shown that if Tycho and Cas A contain an X-ray star such as NP0532, it is quite possible that the X-ray emission from those sources is predominantly due to the X-ray star.
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