TY - JOUR
T1 - A new interpretation for the second peak of T Coronae Borealis outbursts
T2 - A tilting disk around a very massive white dwarf
AU - Hachisu, Izumi
AU - Kato, Mariko
N1 - Funding Information:
This research has been supported in part by the Grant-in-Aid for Scientific Research (08640321, 09640325) of the Japanese Ministry of Education, Science, Culture, and Sports.
PY - 1999/5/20
Y1 - 1999/5/20
N2 - A new interpretation for the second peak of T Coronae Borealis outbursts is proposed based on a thermonuclear runaway (TNR) model. The system consists of a very massive white dwarf (WD) with a tilting accretion disk and a lobe-filling red giant. The first peak of the visual light curve of T CrB outbursts is well reproduced by the TNR model on a WD close to the Chandrasekhar mass (MWD ≳ 1-35 M⊙), while the second peak is reproduced by the combination of the irradiated M giant and the irradiated tilting disk. The derived fitting parameters are the WD mass MWD ∼ 1.35 M⊙, the M giant companion mass MRG ∼ 0.7 M⊙ (0.6-1.0 M⊙ is acceptable), the inclination angle of the orbit i ∼ 70°, and the tilting angle of the disk iprec ∼ 35°. These parameters are consistent with the recently derived binary parameters of T CrB.
AB - A new interpretation for the second peak of T Coronae Borealis outbursts is proposed based on a thermonuclear runaway (TNR) model. The system consists of a very massive white dwarf (WD) with a tilting accretion disk and a lobe-filling red giant. The first peak of the visual light curve of T CrB outbursts is well reproduced by the TNR model on a WD close to the Chandrasekhar mass (MWD ≳ 1-35 M⊙), while the second peak is reproduced by the combination of the irradiated M giant and the irradiated tilting disk. The derived fitting parameters are the WD mass MWD ∼ 1.35 M⊙, the M giant companion mass MRG ∼ 0.7 M⊙ (0.6-1.0 M⊙ is acceptable), the inclination angle of the orbit i ∼ 70°, and the tilting angle of the disk iprec ∼ 35°. These parameters are consistent with the recently derived binary parameters of T CrB.
KW - Accretion, accretion disks
KW - Binaries: close
KW - Binaries: symbiotic
KW - Novae, cataclysmic variables
KW - Stars: individual (T Coronae Borealis)
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U2 - 10.1086/312027
DO - 10.1086/312027
M3 - Article
AN - SCOPUS:0033586822
VL - 517
SP - L47-L50
JO - Astrophysical Journal
JF - Astrophysical Journal
SN - 0004-637X
IS - 1 PART 2
ER -