Pre-nebular Light Curves of SNe I

Journal Article · Fri Sep 01 00:00:00 EDT 2017 · Astrophysical Journal

DOI:https://doi.org/10.3847/1538-4357/AA8173· OSTI ID:22663188

Arnett, W. David ^[1]; Fryer, Christopher ^[2]; Matheson, Thomas ^[3]

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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)

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.

• OSTI ID: 22663188
• Journal Information: Astrophysical Journal, Vol. 846, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
COMPARATIVE EVALUATIONS
EXPLOSIONS
FORECASTING
LUMINOSITY
OPACITY
PLASMA
RAYLEIGH-TAYLOR INSTABILITY
ROUGHNESS
SUPERNOVAE
THERMAL RADIATION
TYPE I SUPERNOVAE
VISIBLE RADIATION