Novae and accreting white dwarfs as progenitors of type Ia supernovae

Mariko Kato

研究成果: Conference contribution

抜粋

I review various phenomena associated with mass-accreting white dwarfs (WDs) in relation to progenitors of Type Ia supernovae (SNe Ia). The WD mass can be estimated from light curve analysis in multiwavelength bands based on the theory of optically thick winds. In the single degenerate scenario of SNe Ia, two main channels are known, i.e., WD + main sequence (MS) channel and WD + red giant (RG) channel. In each channel, a typical binary undergoes three evolutionary stages before explosion, i.e., the wind phase, supersoft X-ray source (SSS) phase, and recurrent nova phase, in this order because the accretion rate decreases with time as the companion mass decreases. For some accreting WDs we can identify the corresponding stage of evolution. Intermittent supersoft X-ray sources like RX J0513.9-6951 and V Sge correspond to wind phase objects. For the SSS phase, CAL 87-type objects correspond to the WD+MS channel. For the WD + RG channel, soft X-ray observations of early type galaxies give statistical evidence of SSS phase binaries. Recurrent novae of U Sco-type and RS Oph-type correspond to the WD + MS channel and WD + RG channel, respectively. The majority of recurrent novae host a very massive WD (≳ 1.35 M) and often show a plateau phase in their optical light curves corresponding to the long-lasting supersoft X-ray phase. These properties are indications of increasing WD masses.

元の言語English
ホスト出版物のタイトルBinary Paths to Type Ia Supernovae Explosions
出版者Cambridge University Press
ページ172-180
ページ数9
エディションS281
ISBN(印刷物)9781107019812
DOI
出版物ステータスPublished - 2011 7

出版物シリーズ

名前Proceedings of the International Astronomical Union
番号S281
7
ISSN(印刷物)1743-9213
ISSN(電子版)1743-9221

    フィンガープリント

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Astronomy and Astrophysics
  • Nutrition and Dietetics
  • Public Health, Environmental and Occupational Health
  • Space and Planetary Science

これを引用

Kato, M. (2011). Novae and accreting white dwarfs as progenitors of type Ia supernovae. : Binary Paths to Type Ia Supernovae Explosions (S281 版, pp. 172-180). (Proceedings of the International Astronomical Union; 巻数 7, 番号 S281). Cambridge University Press. https://doi.org/10.1017/S1743921312014949