Quiescent observations of the WZ Sge type dwarf nova PQ Andromedae

Details Quiescent observations of the WZ Sge type dwarf nova PQ Andromedae Quiescent observations of the WZ Sge type dwarf nova PQ Andromedae

2004-10-20

arxiv.org/abs/astro-ph/0410492v1

Astronomy and Astrophysics

Astrophysics

AASTeX. 8 pages, 6 figures, 3 tables. Accepted to the PASP

Scientific paper

10.1086/426927

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 over strong Balmer absorption. The emission lines have blue and red components whose strength changes with time. An analysis of the H$\alpha$ emission line implies a short orbital period below the period gap. Given its lack of accretion disk features, its large and infrequent outbursts, and an orbital period below the period gap, PQ And is probably a low accretion rate object similar to WZ Sge. In addition, white dwarf model fits imply that PQ And is an excellent ZZ Cet candidate.

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