The soft X-ray background as a supernova blast wave viewed from inside - Solar abundance models

Astronomy and Astrophysics – Astrophysics

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Anisotropy, Astrophysics, Interstellar Matter, Shock Waves, Supernovae, X Ray Astronomy, Astronomical Models, Spatial Distribution, Stellar Mass Ejection

Scientific paper

A model of the soft X-ray background is presented in which the sun is assumed to be inside an active supernova blast wave. The blast wave evolves in a preexisting cavity. The broad band surface brightnesses is explained by such a blast wave with an explosion energy of Eapproximately 5 x 10 to the 50th power ergs and radius 80 to 100 pc, using solar abundances. An approach to treating the problem of large anisotropies in the ambient medium is also explored, accommodating the observed anticorrelation between the soft X-ray surface brightness and the 21 cm column density. It is found that only for post shock temperatures below 10 to the 6 power K a shock propagating into a density enhancement will be dimmer than a similar shock in a lower density region.

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