Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apj...197l..61c&link_type=abstract
Astrophysical Journal, vol. 197, Apr. 15, 1975, pt. 2, p. L61-L63. Research supported by the Science Research Council.
Astronomy and Astrophysics
Astronomy
12
Cassiopeia A, Oao 3, Supernova Remnants, X Ray Spectra, Astronomical Models, Satellite-Borne Instruments, Shock Wave Propagation, Spaceborne Astronomy, X Ray Astronomy, X Ray Telescopes
Scientific paper
The MSSL X-ray telescopes on Copernicus have obtained the spectrum of the supernova remnant Cas A in the energy range 0.5-7.5 keV. The observations may be explained by a two-component thermal spectrum with temperatures of 8 and 30 million degrees K. This result can be broadly interpreted in terms of McKee's (1974) reverse-shock-wave model of young remnants where the lower temperature is attributed to the reverse shock and the higher one to the initial blast wave. A 3-sigma upper limit of 0.02 photons per sq cm per sec was also derived for the emission from a line feature at 2 keV.
Charles Phil A.
Culhane Leonard J.
Fabian Andrea C.
Zarnecki John C.
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