LINEAR-POLARIZATION OF MONOCHROMATIC OSCILLATIONS IN OPTICAL-SPECTRUMOF THE INTERMEDIATE POLAR PQ GEMINORUM

We report the results of optical dynamic spectropolarimetry of the int ermediate polar PQ Gem (RE 0751+14), which were obtained with the help of the linear polarization analyzer and the BTA scanner in a high tim e resolution mode (32 ms) at the 6 m telescope on November 19, 1996. N arrowband spectral oscillations in the vicinity of the spin period (13 .9 min) have been investigated. The dependence of the power of oscilla tions on the wavelengths (3800-5200 Angstrom, 1 Angstrom/channel) and periods of pulsations in the region 300-2000 s with a mean resolution along the period 10 s has been calculated. Power spectra have revealed strong (amplitude approximate to 20%), polarized (dominating in one o f the orthogonal polarizations), monochromatic (FWHM in power spectra 2-3 Angstrom) oscillations with periods of 13.3-15.2 min mainly in the profiles of emission lines. The strong dynamic linear polarization (7 0-80%) with the already detected strong dynamic circular polarization (60-90%) of the monochromatic oscillations make practically impossible any interpretation of the oscillations in the frame of conventional p hysics.