Journal Article

Early Evolution of Spherical Ejecta Expanding into the Circumstellar Matter at Ultra-Relativistic Speeds

Toshikazu Shigeyama, Akihiro Suzuki and Ko Nakamura

in Publications of the Astronomical Society of Japan

Volume 64, issue 4 Published in print August 2012 | ISSN: 0004-6264
Published online August 2012 | e-ISSN: 2053-051X | DOI:

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  • Astrometry and Celestial Mechanics
  • Stars


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We present a new self-similar solution describing the 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.

Keywords: hydrodynamics; relativistic processes; shock waves; supernovae: general

Journal Article.  3368 words.  Illustrated.

Subjects: Astrometry and Celestial Mechanics ; Stars

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