Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-08-18
Astronomy and Astrophysics
Astrophysics
The paper will apear in the October, 2004 issue of PASP
Scientific paper
10.1086/425082
Using newly determined parallaxes for dwarf novae, we have derived outburst accretion rates for VY Aqr, RU Peg and T Leo and for T Leo during quiescence. The two short-period dwarf novae, VY Aqr and T Leo, show good agreement with optically thick steady-state accretion disks in outburst, whereas RU Peg shows a significant departure from a steady-state disk. We have determined that the white dwarf in T Leo has T$_{eff} = 16,000 \pm 1000$ K, a value consistent with long term compressional heating when gravitational wave emission drives mass transfer. The white dwarf in T Leo has a temperature in the same narrow range as other WZ Sge-like dwarf novae.
Hamilton Rowan T.
Sion Edward M.
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