A new interpretation for the second peak of T Coronae Borealis outbursts: A tilting disk around a very massive white dwarf

Izumi Hachisu, Mariko Kato

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

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.

Original languageEnglish
JournalAstrophysical Journal
Volume517
Issue number1 PART 2
Publication statusPublished - 1999 May 20

Fingerprint

outburst
coronas
corona
accretion disks
lobes
light curve
inclination
accretion
orbits
parameter

Keywords

  • Accretion, accretion disks
  • Binaries: close
  • Binaries: symbiotic
  • Novae, cataclysmic variables
  • Stars: individual (T Coronae Borealis)

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

A new interpretation for the second peak of T Coronae Borealis outbursts : A tilting disk around a very massive white dwarf. / Hachisu, Izumi; Kato, Mariko.

In: Astrophysical Journal, Vol. 517, No. 1 PART 2, 20.05.1999.

Research output: Contribution to journalArticle

@article{a75f38dd2ab64e06a88d1bdd1e1531b0,
title = "A new interpretation for the second peak of T Coronae Borealis outbursts: A tilting disk around a very massive white dwarf",
abstract = "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.",
keywords = "Accretion, accretion disks, Binaries: close, Binaries: symbiotic, Novae, cataclysmic variables, Stars: individual (T Coronae Borealis)",
author = "Izumi Hachisu and Mariko Kato",
year = "1999",
month = "5",
day = "20",
language = "English",
volume = "517",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "IOP Publishing Ltd.",
number = "1 PART 2",

}

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

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)

UR - http://www.scopus.com/inward/record.url?scp=0033586822&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0033586822&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0033586822

VL - 517

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 1 PART 2

ER -