GALEX and optical observations of GW Librae during the long decline from superoutburst
Bullock, Eric, Szkody, Paula, Mukadam, Anjum S., Borges, Bernardo W., Fraga, Luciano, Gänsicke, B. T. (Boris T.), Harrison, Thomas E., Henden, Arne, Holtzman, Jon, Howell, Steve B., Lawson, Warrick A., Levine, Stephen, Plotkin, Richard M., Seibert, Mark, Templeton, Matthew, Teske, Johanna and Vrba, Frederick J.. (2011) GALEX and optical observations of GW Librae during the long decline from superoutburst. Astronomical Journal, Vol.141 (No.3). p. 84. ISSN 0004-6256Full text not available from this repository.
Official URL: http://dx.doi.org/10.1088/0004-6256/141/3/84
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.
|Item Type:||Journal Article|
|Subjects:||Q Science > QB Astronomy|
|Divisions:||Faculty of Science > Physics|
|Journal or Publication Title:||Astronomical Journal|
|Publisher:||Institute of Physics Publishing Ltd.|
|Page Range:||p. 84|
|Access rights to Published version:||Restricted or Subscription Access|
|Funder:||NASA GALEX , National Science Foundation (U.S.) (NSF)|
|Grant number:||NNX08AU43G NNX09AF87G (NASA GALEX), AST0607840 (NSF)|
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