AAS 207th Meeting, 8-12 January 2006
Session 70 Cataclysmic Variables and Novae
Poster, Tuesday, 9:20am-6:30pm, January 10, 2006, Exhibit Hall

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[70.19] Polars Changing State: Multiwavelength Long Term Photometry and Spectroscopy of QS Tel, V834 Cen, and BL Hyi

J. R. Gerke (U. Arizona, Steward Obs.), S. B. Howell (WIYN Observatory & NOAO), F. M. Walter (Stony Brook U.)

Long term optical and near-infrared photometric and blue spectroscopic observations where taken for QS Tel, V834 Cen, and BL Hyi. The magnitude change at the low to high state transition of the polars was observed in both the optical and near-infrared, with the amplitude of the near-infrared magnitude change decreasing as the IR was approached. The observed change in luminosity at the low to high state transition was shown to agree with the accretion region reaching the Eddington luminosity during the high state. The average Balmer decrement was calculated for the high and low states of each polar and was used to estimate the temperature and density of the emission line forming region.

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