The physics of Type Ia supernova light curves. II. Opacity and diffusion

Philip A Pinto, Ronald G. Eastman

Research output: Contribution to journalArticle

134 Citations (Scopus)

Abstract

We examine the nature of the opacity and radiation transport in Type Ia supernovae. The dominant opacity arises from line transitions. We discuss the nature of line opacities and diffusion in expanding media and the appropriateness of various mean and expansion opacities used in light-curve calculations. Fluorescence is shown to be the dominant physical process governing the rate at which energy escapes the supernova. We present a sample light curve that was obtained using a time-dependent solution of the radiative transport equation with a spectral resolution of 80 km s-1 and employing an LTE equation of state. The result compares favorably with light curves and spectra of typical supernovae and is used to illustrate the physics controlling the evolution of the light curve and especially the secondary maxima seen in infrared photometry.

Original languageEnglish (US)
Pages (from-to)757-776
Number of pages20
JournalAstrophysical Journal
Volume530
Issue number2 PART 1
StatePublished - Feb 20 2000

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opacity
light curve
supernovae
physics
infrared photometry
radiation transport
local thermodynamic equilibrium
spectral resolution
equation of state
escape
equations of state
fluorescence
expansion
energy

Keywords

  • Distance scale
  • Radiative transfer
  • Supernovae: general

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

The physics of Type Ia supernova light curves. II. Opacity and diffusion. / Pinto, Philip A; Eastman, Ronald G.

In: Astrophysical Journal, Vol. 530, No. 2 PART 1, 20.02.2000, p. 757-776.

Research output: Contribution to journalArticle

Pinto, Philip A ; Eastman, Ronald G. / The physics of Type Ia supernova light curves. II. Opacity and diffusion. In: Astrophysical Journal. 2000 ; Vol. 530, No. 2 PART 1. pp. 757-776.
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