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Astron. Astrophys. 335, 370-378 (1998)

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A point explosion in a freely expanding medium

M.A. Eremin * and I.G. Kovalenko **

Department of Physics, Volgograd State University, 2ya Prodol'naya, 30, 400062 Volgograd, Russia

Received 14 August 1997 / Accepted 16 March 1998


We present an exact invariant solution for a point explosion in an inertially expanding medium. The blast wave dynamics continuously joins the self-similar Sedov asymptotics at early times and asymptotical comoving with the ambient medium at late times. The applications to galactic supershell blowout dynamics and cosmological explosions are discussed.

Key words: Shock waves – ISM: supernova remnants – early Universe

* eremin@physic.vgu.tsaritsyn.su
** igk@physic.vgu.tsaritsyn.su

Send offprint requests to: I.G. Kovalenko

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© European Southern Observatory (ESO) 1998

Online publication: June 12, 1998