THE CONVECTIVE PHASE PRECEDING TYPE Ia SUPERNOVAE

Journal Article · Mon Oct 10 00:00:00 EDT 2011 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/740/1/8; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA)· OSTI ID:21587443

Zingale, M; Malone, C M ^[1]; Nonaka, A; Almgren, A S; Bell, J B ^[2]; Woosley, S E ^[3]

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1. Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800 (United States)
2. Center for Computational Sciences and Engineering, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (United States)
3. Department of Astronomy and Astrophysics, University of California, Santa Cruz, Santa Cruz, CA 95064 (United States)

The convective flow in the moments preceding the explosion of a Type Ia supernova determines where the initial flames that subsequently burn through the star first ignite. We continue our exploration of the final hours of this convection using the low Mach number hydrodynamics code, MAESTRO. We present calculations exploring the effects of slow rotation and show diagnostics that examine the distribution of likely ignition points. In the current calculations, we see a well-defined convection region persist up to the point of ignition, and we see that even a little rotation is enough to break the coherence of the convective flow seen in the radial velocity field. Our results suggest that off-center ignition may be favored, with ignition ranging out to a radius of 100 km and a maximum likelihood of ignition at a radius around 50 km.

• OSTI ID: 21587443
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 1 Vol. 740; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
BINARY STARS
COMPUTER CODES
CONVECTION
DIMENSIONLESS NUMBERS
ENERGY TRANSFER
ERUPTIVE VARIABLE STARS
FLUID MECHANICS
HEAT TRANSFER
HYDRODYNAMICS
IGNITION
M CODES
MACH NUMBER
MASS TRANSFER
MATHEMATICAL SOLUTIONS
MAXIMUM-LIKELIHOOD FIT
MECHANICS
MOTION
NUMERICAL SOLUTION
RADIAL VELOCITY
ROTATION
STARS
SUPERNOVAE
VARIABLE STARS
VELOCITY