TY - GEN
T1 - Impacts of a newly calculated 3α reaction rate on the helium accreting white dwarfs
AU - Saruwatari, Motoaki
AU - Hashimoto, Masa-Aki
PY - 2010/9/21
Y1 - 2010/9/21
N2 - Effects of a new triple-a reaction rate on the ignition of carbon-oxygen white dwarfs accreting helium in a binary systems have been investigated. The ignition points determine the properties of a thermonuclear explosion of a Type la supernova. We examine the cases of different accretion rates of helium and different initial masses of the white dwarf, which was studied in detail by Nomoto[4]. We find that for all cases from slow to intermediate accretion rates, nuclear burnings are ignited at the helium layers. As a consequence, carbon deflagration would be triggered for the lower accretion rate compared to that of dM/dt ≃4 × 10-8M⊙ yr-1 which has been believed to the lower limit of the accretion rate for the deflagration supernova. Furthermore, off-center helium detonation should result for intermediate and slow accretion rates and the region of carbon deflagration for slow accretion rate is disappeared.
AB - Effects of a new triple-a reaction rate on the ignition of carbon-oxygen white dwarfs accreting helium in a binary systems have been investigated. The ignition points determine the properties of a thermonuclear explosion of a Type la supernova. We examine the cases of different accretion rates of helium and different initial masses of the white dwarf, which was studied in detail by Nomoto[4]. We find that for all cases from slow to intermediate accretion rates, nuclear burnings are ignited at the helium layers. As a consequence, carbon deflagration would be triggered for the lower accretion rate compared to that of dM/dt ≃4 × 10-8M⊙ yr-1 which has been believed to the lower limit of the accretion rate for the deflagration supernova. Furthermore, off-center helium detonation should result for intermediate and slow accretion rates and the region of carbon deflagration for slow accretion rate is disappeared.
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U2 - 10.1063/1.3485184
DO - 10.1063/1.3485184
M3 - Conference contribution
AN - SCOPUS:77956643938
SN - 9780735408197
T3 - AIP Conference Proceedings
SP - 412
EP - 414
BT - 10th International Symposium on Origin of Matter and Evolution of Galaxies, OMEG10
T2 - 10th International Symposium on Origin of Matter and Evolution of Galaxies, OMEG10
Y2 - 8 March 2010 through 10 March 2010
ER -