The Response of Model and Astrophysical Thermonuclear Flames to Curvature and Stretch

Details The Response of Model and Astrophysical Thermonuclear Flames to Curvature and Stretch The Response of Model and Astrophysical Thermonuclear Flames to Curvature and Stretch

2003-06-09

arxiv.org/abs/astro-ph/0306176v2

Astrophys.J. 595 (2003) 955-979

Astronomy and Astrophysics

Astrophysics

25 pages; accepted to ApJ; fixed author fields

Scientific paper

10.1086/377433

Critically understanding the `standard candle'-like behavior of Type Ia supernovae requires understanding their explosion mechanism. One family of models for Type Ia Supernovae begins with a deflagration in a Carbon-Oxygen white dwarf which greatly accelerates through wrinkling and flame instabilities. While the planar speed and behavior of astrophysically-relevant flames is increasingly well understood, more complex behavior, such as the flame's response to stretch and curvature, has not been extensively explored in the astrophysical literature; this behavior can greatly enhance or suppress instabilities and local flame-wrinkling, which in turn can increase or decrease the bulk burning rate. In this paper, we explore the effects of curvature on both nuclear flames and simpler model flames to understand the effect of curvature on the flame structure and speed.

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