Copernicus - The X-ray spectrum of Cassiopeia A

Details Copernicus - The X-ray spectrum of Cassiopeia A Copernicus - The X-ray spectrum of Cassiopeia A

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.

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