FUSE Observational Evidence of the Boundary Layer of MY Lyrae in the High State

Details FUSE Observational Evidence of the Boundary Layer of MY Lyrae in the High State FUSE Observational Evidence of the Boundary Layer of MY Lyrae in the High State

2011-07-24

arxiv.org/abs/1107.4793v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

PASP August 2011

Scientific paper

We carry out a spectral analysis of the archival FUSE spectrum of the VY Scl nova-like cataclysmic variable MV Lyrae obtained in the high state. We find that standard disk models fail to fit the flux in the shorter wavelengths of FUSE (< 950$A). An improved fit is obtained by including a modeling of the boundary layer at the inner edge of the disk. The result of the modeling shows that in the high state the disk has a moderate accretion rate of about 2.E09 solar mass per year, a low inclination, a boundary layer with a temperature of around 100,000K, and size 0.20Rwd, and the white dwarf is possibly heated up to a temperature of 50,000K or higher.

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