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Title:
The long-term light curve of the cataclysmic variable DW Ursae Majoris
Authors:
Honeycutt, R. K.; Livio, M.; Robertson, J. W.
Affiliation:
AA(Indiana Univ., Bloomington), AB(Space Telescope Science Inst., Baltimore, MD; Technion - Israel Inst. of Technology, Haifa), AC(Indiana Univ., Bloomington)
Publication:
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 105, no. 691, p. 922-925. (PASP Homepage)
Publication Date:
09/1993
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
ASTRONOMICAL PHOTOMETRY, CATACLYSMIC VARIABLES, LIGHT CURVE, MAGNETIC ANOMALIES, NOVAE, CHARGE COUPLED DEVICES, STELLAR EVOLUTION, STELLAR LUMINOSITY
DOI:
10.1086/133256
Bibliographic Code:
1993PASP..105..922H

Abstract

A 2.5-yr sequence of CCD photometry on DW Ursae Majoris has shown an unusual 4 mag fall and rise in the light curve. The rise appears relatively smooth and regular, unlike the transitions of other high-state/low-state systems. The effect could be due to solar-type magnetic variations on the secondary of the cataclysmic variable. Some observational as well as theoretical work suggests that a nova prior to outburst may show photometric behavior similar to that displayed by DW UMa.

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