Quiescent Observations of the WZ Sagittae–Type Dwarf Nova PQ Andromedae

2004/10/20 by Greg J. Schwarz, Travis Barman, Nicole M. Silvestri +8 · 3 citations
Physics and Astronomy · #Astrophysical Phenomena and Observations #Astrophysics and Star Formation Studies #Gamma-ray bursts and supernovae #astro-ph

paper · pdf · doi:10.1086/426927

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

arxiv created 2004/10/20 · openalex publication_date 2004/12/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30

Abstract

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 Hα 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.

Citations

• Studies in astronomical time series analysis. II - Statistical aspects of spectral analysis of unevenly spaced data
• SDSS J161033.64-010223.3: a second cataclysmic variable with a non-radially pulsating primary

Cited by

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• IDENTIFICATION OF FAINTCHANDRAX-RAY SOURCES IN THE CORE-COLLAPSED GLOBULAR CLUSTER NGC 6397: EVIDENCE FOR A BIMODAL CATACLYSMIC VARIABLE POPULATION
• Discovery of Nonradial Pulsations in PQ Andromedae