Shock Breakout in Dense Mass Loss: Luminous Supernovae

Details Shock Breakout in Dense Mass Loss: Luminous Supernovae Shock Breakout in Dense Mass Loss: Luminous Supernovae

2011-01-05

arxiv.org/abs/1101.1111v2

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

11 pages, ApJL, accepted, minor changes to agree with accepted version

Scientific paper

We examine the case where a circumstellar medium around a supernova is sufficiently opaque that a radiation dominated shock propagates in the circumstellar region. The initial propagation of the shock front into the circumstellar region can be approximated by a self-similar solution that determines the radiative energy in a shocked shell; the eventual escape of this energy gives the maximum luminosity of the supernova. If the circumstellar density is described by \rho=Dr^{-2} out to a radius R_w, where D is a constant, the properties of the shock breakout radiation depend on R_w and R_d\equiv\kappa Dv_{sh}/c, where \kappa is the opacity and v_{sh} is the shock velocity. If R_w>R_d, the rise to maximum light begins at ~ R_d/v_{sh}; the duration of the rise is also ~ R_d/v_{sh}; the outer parts of the opaque medium are extended and at low velocity at the time of peak luminosity; and a dense shell forms whose continued interaction with the dense mass loss gives a characteristic flatter portion of the declining light curve. If R_w

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