5 papers
Discovery of Non-radial pulsations in PQ Andromedae
Karen M. Vanlandingham, Greg J. Schwarz, Steve B. Howell
We have detected pulsations in time-series photometry of the WZ Sge dwarf nova PQ And. The strongest peak in the power spectrum occurs at a period of 10.5 minutes. Similar periods…
New Low Accretion-Rate Magnetic Binary Systems and their Significance for the Evolution of Cataclysmic Variables
G. D. Schmidt, P. Szkody, K. M. Vanlandingham +14
Discoveries of two new white dwarf plus M star binaries with striking optical cyclotron emission features from the Sloan Digital Sky Survey (SDSS) brings to six the total number of…
Magnetic White Dwarfs from the SDSS II. The Second and Third Data Releases
Karen M. Vanlandingham, Gary D. Schmidt, Daniel J. Eisenstein +8
Fifty-two magnetic white dwarfs have been identified in spectroscopic observations from the Sloan Digital Sky Survey (SDSS) obtained between mid-2002 and the end of 2004, including…
New Elemental Abundances for V1974 Cygni
K. M. Vanlandingham, G. J. Schwarz, S. N. Shore +2
We present a new analysis of existing optical and ultraviolet spectra of the ONeMg nova V1974 Cygni 1992. Using these data and the photoionization code Cloudy, we have determined t…
Quiescent observations of the WZ Sge type dwarf nova PQ Andromedae
Greg J. Schwarz, Travis Barman, Nicole Silvestri +4
We have obtained time series optical spectra of the cataclysmic variable PQ And in quiescence. The spectra show a white dwarf continuum with narrow Balmer emission superimposed ove…