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Time-resolved, multi-color photometry and spectroscopy of Virgo 4 (OU Vir): a high orbital inclination, short orbital period dwarf nova

E. Mason·S. B. Howell·P. Szkody·T. E. Harrison·J. A. Holtzman·D. W. Hoard
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Abstract

We present multi-color photometry and time resolved spectroscopy of OU Vir. The analysis of the quiescent light curve shows that OU Vir is characterized by i) strong cycle-to-cycle brightness variations, and ii) hot spot modulated light curve with grazing eclipse of the impact region. Colors are derived both in- and out- of eclipse. The time-resolved spectroscopy allows us to produce the radial velocity curve from the H$α$ accretion disk emission line which possibly reveals only weak evidence for hot spot line emission. The hot spot is believed to be a turbulent optically thick region, producing mostly continuum emission.

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E. Mason, S. B. Howell, P. Szkody, T. E. Harrison, J. A. Holtzman, D. W. Hoard. 2002-10-09. Time-resolved, multi-color photometry and spectroscopy of Virgo 4 (OU Vir): a high orbital inclination, short orbital period dwarf nova. https://doi.org/10.1051/0004-6361%3A20021446

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