Modeling UX Ursae Majoris: An abundance of challenges

Abstract

We present a system model for optical and far UV spectra of the nova-like variable UX UMa involving a white dwarf, secondary star, gas stream, hot spot and accretion disk using our code BINSYN and based on an initially adopted system distance. Calculated SED intensity data successfully fit successive tomographically-extracted annuli longward of the Balmer limit but require a postulated `iron curtain' shortward of the Balmer limit that is applied to the annulus section closest to the secondary star, while postulated recombination emission fills in the model SED shortward of the Balmer limit and is applied to the annulus section more remote from the secondary star. The same model fits $UBV$ 1954 light curves by Walker and Herbig. Fits to $HST$ $FOS$ spectra are approximate but require assumed time-variable changes in the SED. Comparable effects, possibly involving variable absorption, afflict $FUSE$ spectra.

47 pages, 15 figures, accepted for ApJ

References in corpus (12)

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• Recovery of 29-s Oscillations in HST/FOS Eclipse Observations of the Cataclysmic Variable UX Ursae Majoris
• Synthetic Spectrum Constraints on a Model of the Cataclysmic Variable QU Carinae
• HST spatially-resolved spectra of the accretion disc and gas stream of the nova-like variable UX Ursae Majoris

Cited by in corpus (12)

• The Geometry and Ionization Structure of the Wind in the Eclipsing Nova-like Variables RW Tri and UX UMa
• Dark spot, Spiral waves and the SW Sex behaviour: it is all about UX Ursae Majoris
• The anomalous accretion disk of the Cataclysmic Variable RW Sextantis
• SWIFT XRT Observations of the Nova-like Cataclysmic Variables MV Lyr, BZ Cam and V592 Cas
• Accretion-disc precession in UX Ursae Majoris
• A Method for the Study of Accretion Disk Emission in Cataclysmic Variables I: The Model
• V3885 Sagittarius: a Comparison with a Range of Standard Model Accretion Disks
• Novalike Cataclysmic Variables in the Infrared
• A Survey of Far Ultraviolet Spectroscopic Explorer Observations of Cataclysmic Variables
• On the M_V -- Inclination Relationship for Nova-like Variables
• Probing $H_0$ and resolving AGN disks with ultrafast photon counters
• Hubble Space Telescope Cosmic Origins Spectrograph Spectroscopy of the Southern Nova-like BB Doradus in an Intermediate State