Are we in an old superbubble?

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Astrophysics, Interstellar Matter, Supernova Remnants, X Ray Astronomy, Adiabatic Conditions, Background Radiation, Blasts, Gas Heating, Ultraviolet Astronomy

Scientific paper

Using a simple model for the thermal properties of very old supernova remnants and superbubbles, it is found that the observed background soft X-ray and extreme ultraviolet spectra can be produced by a superbubble formed by the injection of about 1052 erg into the interstellar medium surrounding the Earth roughly 4×106 yr ago.

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