X-ray spectroscopy of the young supernova remnant RCW 86

Astronomy and Astrophysics – Astronomy

Scientific paper

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Stellar Spectra, Supernova Remnants, X Ray Astronomy, Early Stars, Ginga Satellite, Supernovae

Scientific paper

An X-ray spectrum of the bright supernova remnant RCW 86 taken by the Japanese X-ray satellite Ginga is analyzed with non-equilibrium ionization models. The spectrum, after correction for galactic ridge emission, is consistent with a type II supernova explosion. From the identification with the historical remnant of A.D. 185 a distance of 0.95 +/- 0.4 kpc is derived. The massive progenitor had a mass of at least 22 solar masses, and went off in a medium modified by its stellar wind with an explosion energy of 2 x 10 exp 44 J. The abundances of Si, S, and Fe are below the solar abundances: 0.7, 0.7, and 0.2 respectively.

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