Bjornsson 2004 SN2002ap的康普顿散射模型

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Title:		The X-Ray and Radio Emission from SN 2002ap: The Importance of Compton Scattering
Authors:		Björnsson, Claes-Ingvar; Fransson, Claes
Affiliation:		AA(Department of Astronomy, AlbaNova University Center, SE-106 91 Stockholm, Sweden.), AB(Department of Astronomy, AlbaNova University Center, SE-106 91 Stockholm, Sweden.)
Publication:		The Astrophysical Journal, Volume 605, Issue 2, pp. 823-829. (ApJ Homepage)
Publication Date:		04/2004
Origin:		UCP
ApJ Keywords:		Gamma Rays: Bursts, Radiation Mechanisms: Nonthermal, Radio Continuum: General, Stars: Supernovae: General, Stars: Supernovae: Individual: Alphanumeric: SN 2002ap
DOI:		10.1086/382584
Bibliographic Code:		2004ApJ...605..823B

Abstract

The radio and X-ray observations of the Type Ic supernova SN 2002ap are modeled. We find that inverse Compton cooling by photospheric photons explains the observed steep radio spectrum, and also the X-ray flux observed by XMM-Newton. Thermal emission from the shock is insufficient to explain the X-ray flux. The radio-emitting region expands with a velocity of ~70,000 km s^-1. From the ratio of X-ray to radio emission, we find that the energy densities of magnetic fields and relativistic electrons are close to equipartition. The mass-loss rate of the progenitor star depends on the absolute value of ɛ_B, and is given by M~1×10^-8(v_w/1000kms^-1)ɛ^-1_BM_solaryr^-1.

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