2008/01/04 by Albert P. Linnell, Patrick Godon, Ivan Hubeny +6 · 1 citation
Decision Sciences · Physics and Astronomy · #Astrophysical Phenomena and Observations #Astrophysics and Star Formation Studies #Scientific Measurement and Uncertainty Evaluation #astro-ph
paper · pdf · doi:10.1086/529118
52 pages, 19 Figures
arxiv created 2008/01/04 · openalex publication_date 2008/03/27 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/31
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 = 1.36 R WD , a narrow intermediate-temperature annulus, and an isothermal remainder to the tidal cutoff boundary. The models include a range of values between 1.0 × 10 −7 and 1.0 × 10 −6 M ☉ yr −1 and limiting values of M WD between 0.6 and 1.2 M ☉ . A solution with M WD = 1.2 M ☉ is consistent with an empirical mass-period relation. The set of models agree on a limited range of possible isothermal region T eff 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°.