1202.5833 (Toshikazu Shigeyama et al.)

Early evolution of spherical ejecta expanding into the circumstellar matter at ultra-relativistic speeds    [PDF]

Toshikazu Shigeyama, Akihiro Suzuki, Ko Nakamura

We present a new self-similar solution describing early evolution of an ultra-relativistic flow resulting from a collision of homologously expanding spherical ejecta with the circumstellar matter, in which a shock wave propagates in the circumstellar matter while a weak discontinuity propagates in the ejecta at the sound speed

View original: http://arxiv.org/abs/1202.5833