X-ray spectrum of Cassiopeia A measured with the Einstein SSS

Details X-ray spectrum of Cassiopeia A measured with the Einstein SSS X-ray spectrum of Cassiopeia A measured with the Einstein SSS

Nov 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...234l..73b&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 234, Nov. 15, 1979, p. L73-L76.

Astronomy and Astrophysics

Astrophysics

78

Cassiopeia Constellation, Heao 2, Stellar Spectra, Supernova Remnants, X Ray Spectra, Abundance, Emission Spectra, Spectrometers, X Ray Sources

Scientific paper

The solid state spectrometer (SSS) on the Einstein Observatory observed the X-ray spectrum of Cas A between 0.8 and 4.5 keV with a FWHM energy resolution of 160 eV. Line emission consistent with transitions of helium-like ions of Si, S, and Ar was well defined. Comparison between the data and the emission expected from a gas containing two distinct thermal components requires additional line emission from Mg, Al, Ca, and Fe. These results are discussed in the context of both equilibrium and nonequilibrium situations.

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