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

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

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.

Original languageEnglish
JournalAstrophysical Journal
Volume651
Issue number2 II
Publication statusPublished - 2006 Nov 10

Fingerprint

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

Keywords

  • Binaries: close
  • Binaries: symbiotic
  • Novae, cataclysmic variables
  • Stars: individual (RS Ophiuchi)
  • Supernovae: general
  • White dwarfs

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

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.

In: Astrophysical Journal, Vol. 651, No. 2 II, 10.11.2006.

Research output: Contribution to journalArticle

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, vol. 651, no. 2 II.
Hachisu I, Kato M, Kiyota S, Kubotera K, Maehara H, Nakajima K et al. The hydrogen-burning turnoff of RS Ophiuchi (2006). Astrophysical Journal. 2006 Nov 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). In: Astrophysical Journal. 2006 ; Vol. 651, No. 2 II.
@article{f5b4f0522268431587a3523363edd9ca,
title = "The hydrogen-burning turnoff of RS Ophiuchi (2006)",
abstract = "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.",
keywords = "Binaries: close, Binaries: symbiotic, Novae, cataclysmic variables, Stars: individual (RS Ophiuchi), Supernovae: general, White dwarfs",
author = "Izumi Hachisu and Mariko Kato and Seiichiro Kiyota and Katsuaki Kubotera and Hiroyuki Maehara and Kazuhiro Nakajima and Yuko Ishii and Mari Kamada and Sahori Mizoguchi and Shinji Nishiyama and Naoko Sumitomo and Ken'ichi Tanaka and Masayuki Yamanaka and Kozo Sadakane",
year = "2006",
month = "11",
day = "10",
language = "English",
volume = "651",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "IOP Publishing Ltd.",
number = "2 II",

}

TY - JOUR

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

UR - http://www.scopus.com/inward/record.url?scp=33845788118&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33845788118&partnerID=8YFLogxK

M3 - Article

VL - 651

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 2 II

ER -