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

Research output: Contribution to journalArticle

11 Citations (Scopus)

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

Fingerprint

cataclysmic variables
annuli
accretion disks
inclination
cut-off
orbitals
accretion

Keywords

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

ASJC Scopus subject areas

  • 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

Synthetic spectrum constraints on a model of the cataclysmic variable QU carinae. / Linnell, Albert P.; Godon, Patrick; Hubeny, Ivan -; Sion, Edward M.; Szkody, Paula; Barrett, Paul E.

In: Astrophysical Journal, Vol. 676, No. 2, 01.04.2008, p. 1226-1239.

Research output: Contribution to journalArticle

Linnell, AP, Godon, P, Hubeny, I, Sion, EM, Szkody, P & Barrett, PE 2008, 'Synthetic spectrum constraints on a model of the cataclysmic variable QU carinae', Astrophysical Journal, vol. 676, no. 2, pp. 1226-1239. https://doi.org/10.1086/529118
Linnell, Albert P. ; Godon, Patrick ; Hubeny, Ivan - ; Sion, Edward M. ; Szkody, Paula ; Barrett, Paul E. / Synthetic spectrum constraints on a model of the cataclysmic variable QU carinae. In: Astrophysical Journal. 2008 ; Vol. 676, No. 2. pp. 1226-1239.
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