The hot white dwarf in the cataclysmic variable MV Lyrae

D. W. Hoard, A. P. Linnell, Paula Szkody, Robert E. Fried, Edward M. Sion, Ivan - Hubeny, M. A. Wolfe

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

We have obtained the first far-ultraviolet spectrum of the nova-like cataclysmic variable MV Lyrae using the Far Ultraviolet Spectroscopic Explorer (FUSE). We also obtained contemporaneous optical light curves and spectra. All data are from a deep faint accretion state of MV Lyr. We constructed a model for the system using the BINSYN software package; results from this model include the following: (1) The white dwarf has Teff = 47,000 K, photospheric log g = 8.25, and metallicity of Z ≈ 0.3 Z. (2) The secondary star is cooler than 3500 K; it contributes nothing to the far-ultraviolet flux and a varying amount to the optical flux (from 10% at 5200 Å to 60% at 7800 Å). (3) The accretion disk, if present at all, contributes negligibly to the spectrum of MV Lyr. Irradiation considerations imply that the mass transfer rate is no more than 3 x 10-13 M yr-1. (4) Assuming no disk is present, the model optical light curve has an amplitude approximately 50% larger than that of the sinusoidal modulation (on the orbital period) in the observed optical light curve, suggesting that the secondary star might be shaded by a nascent disk and/or have starspots near the L1 point. (5) The scaling of the model spectrum to the observed data leads to a distance of d = 505 ± 50 pc to MV Lyr.

Original languageEnglish (US)
Pages (from-to)346-356
Number of pages11
JournalAstrophysical Journal
Volume604
Issue number1 I
DOIs
StatePublished - Mar 20 2004
Externally publishedYes

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cataclysmic variables
light curve
accretion
starspots
stars
ultraviolet spectra
coolers
accretion disks
mass transfer
metallicity
irradiation
computer programs
software
modulation
scaling
orbitals

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Hoard, D. W., Linnell, A. P., Szkody, P., Fried, R. E., Sion, E. M., Hubeny, I. ., & Wolfe, M. A. (2004). The hot white dwarf in the cataclysmic variable MV Lyrae. Astrophysical Journal, 604(1 I), 346-356. https://doi.org/10.1086/381777

The hot white dwarf in the cataclysmic variable MV Lyrae. / Hoard, D. W.; Linnell, A. P.; Szkody, Paula; Fried, Robert E.; Sion, Edward M.; Hubeny, Ivan -; Wolfe, M. A.

In: Astrophysical Journal, Vol. 604, No. 1 I, 20.03.2004, p. 346-356.

Research output: Contribution to journalArticle

Hoard, DW, Linnell, AP, Szkody, P, Fried, RE, Sion, EM, Hubeny, I & Wolfe, MA 2004, 'The hot white dwarf in the cataclysmic variable MV Lyrae', Astrophysical Journal, vol. 604, no. 1 I, pp. 346-356. https://doi.org/10.1086/381777
Hoard DW, Linnell AP, Szkody P, Fried RE, Sion EM, Hubeny I et al. The hot white dwarf in the cataclysmic variable MV Lyrae. Astrophysical Journal. 2004 Mar 20;604(1 I):346-356. https://doi.org/10.1086/381777
Hoard, D. W. ; Linnell, A. P. ; Szkody, Paula ; Fried, Robert E. ; Sion, Edward M. ; Hubeny, Ivan - ; Wolfe, M. A. / The hot white dwarf in the cataclysmic variable MV Lyrae. In: Astrophysical Journal. 2004 ; Vol. 604, No. 1 I. pp. 346-356.
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