A normal and superoutburst study of the eclipsing SU UMa star: DV Ursae Majoris

Details A normal and superoutburst study of the eclipsing SU UMa star: DV Ursae Majoris A normal and superoutburst study of the eclipsing SU UMa star: DV Ursae Majoris

Mar 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001mnras.322...79n&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 322, Issue 1, pp. 79-84.

Astronomy and Astrophysics

Astronomy

11

Accretion, Accretion Discs, Eclipses, Stars: Individual: Dv Uma, Novae, Cataclysmic Variables

Scientific paper

We report on time-resolved photometry carried out during the 1995 short outburst and the 1997 long outburst in the eclipsing dwarf nova DV UMa. The revised orbital period is 0.0858526172 (67)d. We detected gigantic superhumps with an amplitude of ~0.6mag in the mid-phase of the 1997 outburst, revealing the SU UMa nature of DV UMa. The superhump period is 0.0887 (4)d. The superhumps became less clear during the late phase of the superoutburst, and we found two possible periods of 0.0885 (15) and 0.0764 (15). During both outbursts, the eclipse was wide and shallow near the maximum, and then became narrower and deeper, which is qualitatively well explained by the current disc instability theory.

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