Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...234l..69m&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 234, Nov. 15, 1979, p. L69-L72. Research supported by Radcliffe Trus
Astronomy and Astrophysics
Astrophysics
61
Cassiopeia Constellation, Heao 2, Supernova Remnants, X Ray Astronomy, Astronomical Observatories, Astrophysics, High Resolution, Neutron Stars
Scientific paper
Cas A was observed with the imaging detectors on the Einstein X-ray Observatory. The mass of the expanding shell due to the interaction of the blast wave and the ambient medium is determined. This indicates that Cas A is probably not in the free expansion phase, but has not yet reached the adiabatic phase of expansion. Detailed comparison of X-ray, optical, and radio images shows various degrees of correlation, indicating that several processes for emission are present. An upper limit of 1,500,000 K is established for any stellar remnant that is below the expected temperature of a neutron star by a factor of about 5. The total mass of the SNR is found to be 10-30 solar masses
Epstein Adam
Fabbiano Giuseppina
Fabian Andrea C.
Giacconi Ricardo
Murray Stephen S.
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