Impacts of a newly calculated 3α reaction rate on the helium accreting white dwarfs

Motoaki Saruwatari, Masa-Aki Hashimoto

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

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.

Original languageEnglish
Title of host publication10th International Symposium on Origin of Matter and Evolution of Galaxies, OMEG10
Pages412-414
Number of pages3
DOIs
Publication statusPublished - Sep 21 2010
Event10th International Symposium on Origin of Matter and Evolution of Galaxies, OMEG10 - Osaka, Japan
Duration: Mar 8 2010Mar 10 2010

Publication series

NameAIP Conference Proceedings
Volume1269
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other10th International Symposium on Origin of Matter and Evolution of Galaxies, OMEG10
CountryJapan
CityOsaka
Period3/8/103/10/10

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All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Plant Science
  • Physics and Astronomy(all)
  • Nature and Landscape Conservation

Cite this

Saruwatari, M., & Hashimoto, M-A. (2010). Impacts of a newly calculated 3α reaction rate on the helium accreting white dwarfs. In 10th International Symposium on Origin of Matter and Evolution of Galaxies, OMEG10 (pp. 412-414). (AIP Conference Proceedings; Vol. 1269). https://doi.org/10.1063/1.3485184