LOW MACH NUMBER MODELING OF TYPE IA SUPERNOVAE. IV. WHITE DWARF CONVECTION
نویسندگان
چکیده
منابع مشابه
LOW MACH NUMBER MODELING OF TYPE Ia SUPERNOVAE. I. HYDRODYNAMICS
We introduce a low Mach number equation set for the large-scale numerical simulation of carbon-oxygen white dwarfs experiencing a thermonuclear deflagration. Since most of the interesting physics in a Type Ia supernova transpires at Mach numbers from 0.01 to 0.1, such an approach enables both a considerable increase in accuracy and a savings in computer time compared with frequently used compre...
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We continue the description of a lowMach number hydrodynamics algorithm for reacting, full star flows. Here we demonstrate how to accurately incorporate reactions using a second-order accurate Strang-splitting technique. We also improve the fidelity of the model by allowing the base state to evolve in response to large-scale convection as well as large-scale heating, taking care to account for ...
متن کاملLOW MACH NUMBER MODELING OF TYPE Ia SUPERNOVAE. II. ENERGY EVOLUTION
The convective period leading up to a Type Ia supernova (SN Ia) explosion is characterized by very low Mach number flows, requiring hydrodynamic methods well-suited to long-time integration. We continue the development of the lowMach number equation set for stellar-scale flows by incorporating the effects of heat release due to external sources. Low Mach number hydrodynamics equations with a ti...
متن کاملv 1 2 9 Se p 20 05 Low Mach Number Modeling of Type Ia Supernovae
We introduce a low Mach number equation set for the large-scale numerical simulation of carbon-oxygen white dwarfs experiencing a thermonuclear defla-gration. Since most of the interesting physics in a Type Ia supernova transpires at Mach numbers from 0.01 to 0.1, such an approach enables both a considerable increase in accuracy and savings in computer time compared with frequently used compres...
متن کاملThe Rate of Type Ia Supernovae in Nearby Dwarf Galaxies
We used the Robotic Optical Transient Search Experiment (ROTSE-III) astrophysical transient survey to determine the rate of type Ia supernovae (SNe Ia) in dwarf galaxies within a radius of 310 Mpc. The rate is inferred from the SNe Ia sample discovered by ROTSE-III and a Monte Carlo simulation that estimates the ROTSE-III SNe Ia detection efficiency. Assuming that the rate of SNe Ia is the same...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2009
ISSN: 0004-637X,1538-4357
DOI: 10.1088/0004-637x/704/1/196