Optical light curves of RS Oph (2006) and hydrogen burning turnoff

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dc.creatorHachisu, Izumi
dc.creatorKato, Mariko
dc.creatorKiyota, Seiichiro
dc.creatorKubotera, Katsuaki
dc.creatorMaehara, Hiroyuki
dc.creatorNakajima, Kazuhiro
dc.creatorIshii, Yuko
dc.creatorKamada, Mari
dc.creatorMizoguchi, Sahori
dc.creatorNishiyama, Shinji
dc.creatorSumitomo, Naoko
dc.creatorTanaka, Ken'ichi
dc.creatorYamanaka, Masayuki
dc.creatorSadakane, Kozo
dc.date2008-07-08
dc.date.accessioned2026-07-07T09:49:05Z
dc.date.available2026-07-07T09:49:05Z
dc.descriptionWe report a coordinated multi-band photometry of the RS Oph 2006 outburst and highlight the emission line free y-band photometry that shows a mid-plateau phase at y ~ 10.2 mag from day 40 to day 75 after the discovery followed by a sharp drop of the final decline. Such mid-plateau 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 early decline, mid-plateau phase, and final decline. The 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 \pm 0.01 M_\sun, 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. Observational data of y magnitudes are provided here together with other multi-wavelength light curve data.
dc.description6 pages, 1 figures, Proceeding of "RS Ophiuchi (2006)" conference held at Keele, 12-14 June 2007
dc.identifierhttps://arxiv.org/abs/0807.1240
dc.identifierhttp://arxiv.org/abs/0807.1240
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/164451
dc.subjectAstrophysics
dc.titleOptical light curves of RS Oph (2006) and hydrogen burning turnoff
dc.typetext

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