The hydrogen-burning turnoff of RS Ophiuchi (2006)

Izumi Hachisu, Mariko Kato, Seiichiro Kiyota, Katsuaki Kubotera, Hiroyuki Maehara, Kazuhiro Nakajima, Yuko Ishii, Mari Kamada, Sahori Mizoguchi, Shinji Nishiyama, Naoko Sumitomo, Ken'ichi Tanaka, Masayuki Yamanaka, Kozo Sadakane

研究成果: Article

43 引用 (Scopus)

抄録

We report a coordinated multiband photometry of the RS Oph 2006 outburst and highlight the emission-line-free -band photometry that shows a midplateau phase y ∼ 10.2 mag from day 40 to day 75 after the discovery, followed by a sharp drop of the final decline. Such midplateau phases are observed in other two recurrent novae, U Sco and CI Aql, and are interpreted as a bright disk irradiated by the white dwarf. We have calculated theoretical light curves based on the optically thick wind theory and have reproduced the observed light curves, including the midplateau phase and the final sharp decline. This final decline is identified with the end of steady hydrogen shell burning, which turned out at about day 80. This turnoff date is consistent with the end of a supersoft X-ray phase observed with Swift. Our model suggests a white dwarf mass of 1.35 ± 0.01 M, which indicates that RS Oph is a progenitor of Type Ia supernovae. We strongly recommend the y-filter observation of novae to detect both the presence of a disk and the hydrogen burning turnoff.

元の言語English
ジャーナルAstrophysical Journal
651
発行部数2 II
出版物ステータスPublished - 2006 11 10

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novae
light curve
photometry
hydrogen
outburst
supernovae
shell
filter
filters
x rays

ASJC Scopus subject areas

  • Space and Planetary Science

これを引用

Hachisu, I., Kato, M., Kiyota, S., Kubotera, K., Maehara, H., Nakajima, K., ... Sadakane, K. (2006). The hydrogen-burning turnoff of RS Ophiuchi (2006). Astrophysical Journal, 651(2 II).

The hydrogen-burning turnoff of RS Ophiuchi (2006). / Hachisu, Izumi; Kato, Mariko; Kiyota, Seiichiro; Kubotera, Katsuaki; Maehara, Hiroyuki; Nakajima, Kazuhiro; Ishii, Yuko; Kamada, Mari; Mizoguchi, Sahori; Nishiyama, Shinji; Sumitomo, Naoko; Tanaka, Ken'ichi; Yamanaka, Masayuki; Sadakane, Kozo.

:: Astrophysical Journal, 巻 651, 番号 2 II, 10.11.2006.

研究成果: Article

Hachisu, I, Kato, M, Kiyota, S, Kubotera, K, Maehara, H, Nakajima, K, Ishii, Y, Kamada, M, Mizoguchi, S, Nishiyama, S, Sumitomo, N, Tanaka, K, Yamanaka, M & Sadakane, K 2006, 'The hydrogen-burning turnoff of RS Ophiuchi (2006)', Astrophysical Journal, 巻. 651, 番号 2 II.
Hachisu I, Kato M, Kiyota S, Kubotera K, Maehara H, Nakajima K その他. The hydrogen-burning turnoff of RS Ophiuchi (2006). Astrophysical Journal. 2006 11 10;651(2 II).
Hachisu, Izumi ; Kato, Mariko ; Kiyota, Seiichiro ; Kubotera, Katsuaki ; Maehara, Hiroyuki ; Nakajima, Kazuhiro ; Ishii, Yuko ; Kamada, Mari ; Mizoguchi, Sahori ; Nishiyama, Shinji ; Sumitomo, Naoko ; Tanaka, Ken'ichi ; Yamanaka, Masayuki ; Sadakane, Kozo. / The hydrogen-burning turnoff of RS Ophiuchi (2006). :: Astrophysical Journal. 2006 ; 巻 651, 番号 2 II.
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T1 - The hydrogen-burning turnoff of RS Ophiuchi (2006)

AU - Hachisu, Izumi

AU - Kato, Mariko

AU - Kiyota, Seiichiro

AU - Kubotera, Katsuaki

AU - Maehara, Hiroyuki

AU - Nakajima, Kazuhiro

AU - Ishii, Yuko

AU - Kamada, Mari

AU - Mizoguchi, Sahori

AU - Nishiyama, Shinji

AU - Sumitomo, Naoko

AU - Tanaka, Ken'ichi

AU - Yamanaka, Masayuki

AU - Sadakane, Kozo

PY - 2006/11/10

Y1 - 2006/11/10

N2 - We report a coordinated multiband photometry of the RS Oph 2006 outburst and highlight the emission-line-free -band photometry that shows a midplateau phase y ∼ 10.2 mag from day 40 to day 75 after the discovery, followed by a sharp drop of the final decline. Such midplateau phases are observed in other two recurrent novae, U Sco and CI Aql, and are interpreted as a bright disk irradiated by the white dwarf. We have calculated theoretical light curves based on the optically thick wind theory and have reproduced the observed light curves, including the midplateau phase and the final sharp decline. This final decline is identified with the end of steady hydrogen shell burning, which turned out at about day 80. This turnoff date is consistent with the end of a supersoft X-ray phase observed with Swift. Our model suggests a white dwarf mass of 1.35 ± 0.01 M⊙, which indicates that RS Oph is a progenitor of Type Ia supernovae. We strongly recommend the y-filter observation of novae to detect both the presence of a disk and the hydrogen burning turnoff.

AB - We report a coordinated multiband photometry of the RS Oph 2006 outburst and highlight the emission-line-free -band photometry that shows a midplateau phase y ∼ 10.2 mag from day 40 to day 75 after the discovery, followed by a sharp drop of the final decline. Such midplateau phases are observed in other two recurrent novae, U Sco and CI Aql, and are interpreted as a bright disk irradiated by the white dwarf. We have calculated theoretical light curves based on the optically thick wind theory and have reproduced the observed light curves, including the midplateau phase and the final sharp decline. This final decline is identified with the end of steady hydrogen shell burning, which turned out at about day 80. This turnoff date is consistent with the end of a supersoft X-ray phase observed with Swift. Our model suggests a white dwarf mass of 1.35 ± 0.01 M⊙, which indicates that RS Oph is a progenitor of Type Ia supernovae. We strongly recommend the y-filter observation of novae to detect both the presence of a disk and the hydrogen burning turnoff.

KW - Binaries: close

KW - Binaries: symbiotic

KW - Novae, cataclysmic variables

KW - Stars: individual (RS Ophiuchi)

KW - Supernovae: general

KW - White dwarfs

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