High spectral resolution time-resolved optical spectroscopy of V893 Sco

Details High spectral resolution time-resolved optical spectroscopy of V893 Sco High spectral resolution time-resolved optical spectroscopy of V893 Sco

2001-10-10

arxiv.org/abs/astro-ph/0110260v1

Astronomy and Astrophysics

Astrophysics

23 pages (total), 8 figures, accepted by ApJ

Scientific paper

10.1086/323431

We present high resolution time-resolved optical spectra of the high inclination short orbital period dwarf nova V893 Sco. We performed spectral analysis through radial velocity measurements, Doppler mapping, and ratioed Doppler maps. Our results indicate that V893 Sco's accretion disk is dissimilar to WZ Sge's accretion disk, and does not fit any of the current accretion disk models. We derive the system parameters M1 and i, and present evidence for V893 Sco as a very young cataclysmic variable and an ER UMa star. We advance the hypothesis that all ER UMa stars may be newly formed cataclysmic variables.

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