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dc.contributor.authorBullock, E.
dc.contributor.authorSzkody, P.
dc.contributor.authorMukadam, A.
dc.contributor.authorBorges, B.
dc.contributor.authorFraga, L.
dc.contributor.authorGänsicke, B.
dc.contributor.authorHarrison, T.
dc.contributor.authorHenden, A.
dc.contributor.authorHoltzman, J.
dc.contributor.authorHowell, S.
dc.contributor.authorLawson, W.
dc.contributor.authorLevine, S.
dc.contributor.authorPlotkin, Richard
dc.contributor.authorSeibert, M.
dc.contributor.authorTempleton, M.
dc.contributor.authorTeske, J.
dc.contributor.authorVrba, F.
dc.identifier.citationBullock, E. and Szkody, P. and Mukadam, A. and Borges, B. and Fraga, L. and Gänsicke, B. and Harrison, T. et al. 2011. Galex and optical observations of GW librae during the long decline from superoutburst. Astronomical Journal. 141: 84.

The prototype of accreting, pulsating white dwarfs (GW Lib) underwent a large amplitude dwarf nova outburst in 2007. We used ultraviolet data from Galaxy Evolution Explorer and ground-based optical photometry and spectroscopy to follow GW Lib for three years following this outburst. Several variations are apparent during this interval. The optical shows a superhump modulation in the months following outburst, while a 19 minute quasi-periodic modulation lasting for several months is apparent in the year after outburst. A long timescale (about 4 hr) modulation first appears in the UV a year after outburst and increases in amplitude in the following years. This variation also appears in the optical two years after outburst but is not in phase with the UV. The pre-outburst pulsations are not yet visible after three years, likely indicating the white dwarf has not returned to its quiescent state.

dc.publisherInstitute of Physics Publishing
dc.titleGalex and optical observations of GW librae during the long decline from superoutburst
dc.typeJournal Article
dcterms.source.titleAstronomical Journal

Copyright © 2011 The American Astronomical Society. All rights reserved.

curtin.departmentDepartment of Physics and Astronomy
curtin.accessStatusOpen access

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