Non-thermal photon production via bulk comptonization at supernova shock breakout

Abstract

We investigate roles of the bulk comptonization process in the propagation of thermal photons emitted at the shock breakout of a supernova explosion. We use a hydrodynamical model based on a self-similar solution for the shock breakout. The propagation of photons is treated by a Monte-Carlo technique. Results of the simulations successfully reproduce the power-law spectrum observed by X-ray observations for XRF 080109/SN 2008D, if a mildly relativistic shock velocity is assumed. Effects of some radiative processes, photoionization, radiative recombination, and free-free absorption on the propagation of emitted photons are also investigated. It is found that none of them hardly changes the spectrum regarding the progenitor stars of type Ib or Ic supernovae. Light curves calculated under the assumption of a spherical explosion indicate that the progenitor radius is required to be $/sim10^{13}$ cm.

10pages, 6 figures, to appear in ApJ

References in corpus (9)

• From Shock Breakout to Peak and Beyond: Extensive Panchromatic Observations of the Type Ib Supernova 2008D associated with Swift X-ray Transient 080109
• The metamorphosis of Supernova SN2008D/XRF080109: a link between Supernovae and GRBs/Hypernovae
• Supernova Shock Breakout from a Red Supergiant
• Probing Shock Breakout with Serendipitous GALEX Detections of Two SNLS Type II-P Supernovae
• Nonthermal gamma-ray and X-ray flashes from shock breakout in gamma-ray bursts/supernovae
• Nebular Phase Observations of the Type Ib Supernova 2008D/X-ray Transient 080109: Side-Viewed Bipolar Explosion
• The X-Ray Transient 080109 in NGC 2770: an X-Ray Flash Associated with a Normal Core-Collapse Supernova
• VLBI Observations of SN 2008D
• Self-similar solutions for the emergence of energy varying shock waves from plane-parallel atmospheres

Cited by in corpus (12)

• Shock Breakout in Type II Plateau Supernovae: Prospects for High Redshift Supernova Surveys
• A search for thermal X-ray signatures in Gamma-Ray Bursts I: Swift bursts with optical supernovae
• 2D radiaition-hydrodynamic simulations of supernova shock breakout in bipolar explosions of a blue supergiant progenitor
• The Role of Inhomogeneities in Supernova Shock Breakout Emission
• The Limited Contribution of Low- and High-Luminosity Gamma-Ray Bursts to Ultra-High Energy Cosmic Rays
• The Spectrum of a Fast Shock Breakout from a Stellar Wind
• Monte-Carlo simulations of fast Newtonian and mildly relativistic shock breakout from a stellar wind
• Numeric spectral radiation hydrodynamic calculations of supernova shock breakouts
• Compton degradation of gamma-ray line emission from radioactive isotopes in the classical nova V2491 Cygni
• Generation of High-Energy Photons at Ultra-Relativistic Shock Breakout in Supernovae
• X-ray Light Curve and Spectra of Shock Breakout in a Wind
• Validation of Radiative Transfer Computation with Monte Carlo Method for Ultra-Relativistic Background Flow