skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Pre-nebular Light Curves of SNe I

Abstract

We compare analytic predictions of supernova light curves with recent high-quality data from SN2011fe (Ia), KSN2011b (Ia), and the Palomar Transient Factory and the La Silla-QUEST variability survey (LSQ) (Ia). Because of the steady, fast cadence of observations, KSN2011b provides unique new information on SNe Ia: the smoothness of the light curve, which is consistent with significant large-scale mixing during the explosion, possibly due to 3D effects (e.g., Rayleigh–Taylor instabilities), and provides support for a slowly varying leakage (mean opacity). For a more complex light curve (SN2008D, SN Ib), we separate the luminosity due to multiple causes and indicate the possibility of a radioactive plume. The early rise in luminosity is shown to be affected by the opacity (leakage rate) for thermal and non-thermal radiation. A general derivation of Arnett’s rule again shows that it depends upon all processes heating the plasma, not just radioactive ones, so that SNe Ia will differ from SNe Ibc if the latter have multiple heating processes.

Authors:
 [1];  [2];  [3]
  1. Steward Observatory, University of Arizona, 933 N. Cherry Avenue, Tucson, AZ 85721 (United States)
  2. Los Alamos National Laboratory, Los Alamos, NM (United States)
  3. National Optical Astronomy Observatory, Tucson, AZ (United States)
Publication Date:
OSTI Identifier:
22663188
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 846; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COMPARATIVE EVALUATIONS; EXPLOSIONS; FORECASTING; LUMINOSITY; OPACITY; PLASMA; RAYLEIGH-TAYLOR INSTABILITY; ROUGHNESS; SUPERNOVAE; THERMAL RADIATION; TYPE I SUPERNOVAE; VISIBLE RADIATION

Citation Formats

Arnett, W. David, Fryer, Christopher, and Matheson, Thomas. Pre-nebular Light Curves of SNe I. United States: N. p., 2017. Web. doi:10.3847/1538-4357/AA8173.
Arnett, W. David, Fryer, Christopher, & Matheson, Thomas. Pre-nebular Light Curves of SNe I. United States. doi:10.3847/1538-4357/AA8173.
Arnett, W. David, Fryer, Christopher, and Matheson, Thomas. Fri . "Pre-nebular Light Curves of SNe I". United States. doi:10.3847/1538-4357/AA8173.
@article{osti_22663188,
title = {Pre-nebular Light Curves of SNe I},
author = {Arnett, W. David and Fryer, Christopher and Matheson, Thomas},
abstractNote = {We compare analytic predictions of supernova light curves with recent high-quality data from SN2011fe (Ia), KSN2011b (Ia), and the Palomar Transient Factory and the La Silla-QUEST variability survey (LSQ) (Ia). Because of the steady, fast cadence of observations, KSN2011b provides unique new information on SNe Ia: the smoothness of the light curve, which is consistent with significant large-scale mixing during the explosion, possibly due to 3D effects (e.g., Rayleigh–Taylor instabilities), and provides support for a slowly varying leakage (mean opacity). For a more complex light curve (SN2008D, SN Ib), we separate the luminosity due to multiple causes and indicate the possibility of a radioactive plume. The early rise in luminosity is shown to be affected by the opacity (leakage rate) for thermal and non-thermal radiation. A general derivation of Arnett’s rule again shows that it depends upon all processes heating the plasma, not just radioactive ones, so that SNe Ia will differ from SNe Ibc if the latter have multiple heating processes.},
doi = {10.3847/1538-4357/AA8173},
journal = {Astrophysical Journal},
issn = {0004-637X},
number = 1,
volume = 846,
place = {United States},
year = {2017},
month = {9}
}