Has interstellar forbidden Fe X been detected in the spectrum of SN 1987 A?

Astronomy and Astrophysics – Astrophysics

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Absorption Spectra, Diffuse Radiation, Forbidden Transitions, Interstellar Matter, Iron, Stellar Spectra, Supernova 1987A, Heao 2, Magellanic Clouds, Red Shift, Rosat Mission, Spectral Line Width

Scientific paper

The detection of forbidden Fe X is found to be inconsistent with the low levels of diffuse X-ray flux identified with the Einstein and Rosat X-ray satellites. The observed line can be interpreted as the slightly redshifted wavelength 6379.3 of the diffuse interstellar band, in which case the velocity would equal that of the strong interstellar atomic lines in the spectrum of SN 1987 A. The unique feature is interpreted to be evidence of variations in the ratios of interstellar lines for absorbing clouds.

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