Synthetic spectrum constraints on a model of the cataclysmic variable QU carinae

Albert P. Linnell, Patrick Godon, Ivan Hubeny, Edward M. Sion, Paula Szkody, Paul E. Barrett

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Abstract

Neither standard model SEDs nor truncated standard model SEDs fit observed spectra of QU Carinae with acceptable accuracy over the range 900-3000 Å. Nonstandard model SEDs fit the observation set accurately. The nonstandard accretion disk models have a hot region extending from the white dwarf to R = 1.36RWD a narrow intermediate-temperature annulus, and an isothermal remainder to the tidal cutoff boundary. The models include a range of M values between 1.0 × 1.0-7 and 1.0 × 10-6 M ̇ yr-1 and limiting values of MWD between 0.6 and 1.2 M. A solution with MWD =1.2 M is consistent with an empirical mass-period relation. The set of models agree on a limited range of possible isothermal region Teff values between 14,000 and 18,000 K. The model-to-model residuals are so similar that it is not possible to choose a best model. The Hipparcos distance, 610 pc, is representative of the model results. The orbital inclination is between 40° and 60°.

Original languageEnglish (US)
Pages (from-to)1226-1239
Number of pages14
JournalAstrophysical Journal
Volume676
Issue number2
DOIs
StatePublished - Apr 1 2008

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Keywords

  • Novae, cataclysmic variables
  • Stars: individual (constellation name: QU carinae)
  • White dwarfs

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Linnell, A. P., Godon, P., Hubeny, I., Sion, E. M., Szkody, P., & Barrett, P. E. (2008). Synthetic spectrum constraints on a model of the cataclysmic variable QU carinae. Astrophysical Journal, 676(2), 1226-1239. https://doi.org/10.1086/529118