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1	ON MASSES OF ACCRETION DISKS IN TYPE IA SUPERNOVA PROGENITORS // Tomsk State Pedagogical University Bulletin. 2012. Issue 13 (128). P. 170-175 Recent explanation [1] of high-velocity features in type Ia supernovae (SNIa) requires signicant mass of circumstellar material (CSM) in SNIa progenitor system. If correct, it provides means of determining the mass of CSM along the line of sight. We study the distribution of mass in accretion disk, a natural candidate for the needed CSM. Accurate equation of state and Rosseland-mean opacities are used; several models for the latter are compared. We conclude that the standard model of accretion disks in SNIa progenitors does not yield the needed mass distribution to agree with observations. Keywords: accretion disk, supernova, circumstellar matter, radiative transfer, opacity	866

ON MASSES OF ACCRETION DISKS IN TYPE IA SUPERNOVA PROGENITORS // Tomsk State Pedagogical University Bulletin. 2012. Issue 13 (128). P. 170-175

Recent explanation [1] of high-velocity features in type Ia supernovae (SNIa) requires signicant mass of circumstellar material (CSM) in SNIa progenitor system. If correct, it provides means of determining the mass of CSM along the line of sight. We study the distribution of mass in accretion disk, a natural candidate for the needed CSM. Accurate equation of state and Rosseland-mean opacities are used; several models for the latter are compared. We conclude that the standard model of accretion disks in SNIa progenitors does not yield the needed mass distribution to agree with observations.

Keywords: accretion disk, supernova, circumstellar matter, radiative transfer, opacity

866

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