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

18 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
Pages (from-to)L47-L50
JournalAstrophysical Journal
Volume517
Issue number1 PART 2
Publication statusPublished - 1999 May 20

Keywords

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

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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