X-ray line emission from the TYCHO supernova remnant

Details X-ray line emission from the TYCHO supernova remnant X-ray line emission from the TYCHO supernova remnant

Jan 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...235l...9p&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 235, Jan. 1, 1980, p. L9-L12.

Astronomy and Astrophysics

Astronomy

29

Astronomical Spectroscopy, Supernova Remnants, X Ray Astronomy, X Ray Spectra, Emission Spectra, Heao 1, K Lines, Metals, Nebulae

Scientific paper

The A-2 experiment onboard HEAO 1 has observed the X-ray spectrum of the Tycho supernova remnant in the energy range 0.5-20 keV. The spectrum reveals four significant line features: the K(alpha) lines of silicon, sulfur, and iron; and the L lines of iron. Comparisons between the silicon and sulfur equivalent widths and K(alpha) iron line energies of Tycho and Cas A suggest that the X-ray emitting plasma in Tycho is further from collisional ionization equilibrium than that in Cas A.

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