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    Galex and optical observations of GW librae during the long decline from superoutburst

    251718.pdf (1.178Mb)
    Access Status
    Open access
    Authors
    Bullock, E.
    Szkody, P.
    Mukadam, A.
    Borges, B.
    Fraga, L.
    Gänsicke, B.
    Harrison, T.
    Henden, A.
    Holtzman, J.
    Howell, S.
    Lawson, W.
    Levine, S.
    Plotkin, Richard
    Seibert, M.
    Templeton, M.
    Teske, J.
    Vrba, F.
    Date
    2011
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Bullock, 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.
    Source Title
    Astronomical Journal
    DOI
    10.1088/0004-6256/141/3/84
    ISSN
    0004-6256
    School
    Department of Physics and Astronomy
    Remarks

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

    URI
    http://hdl.handle.net/20.500.11937/52206
    Collection
    • Curtin Research Publications
    Abstract

    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.

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