Spectropolarimetric Observations of Magnetic White Dwarfs with the SAO 6-m Telescope


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The results of spectropolarimetric observations of a number of magnetic white dwarfs obtained on the 6-m optical telescope of the Special Astrophysical Observatory are presented. The observations were carried out using the SCORPIO focal aperture-ratio reducer in a spectropolarimetric regime. Two characteristic dependences of the degree of polarization on the wavelength are observed. For one group of objects, the degree of linear polarization grows with wavelength, suggesting that the alignment of atoms and molecules in Rydberg states in the atmosphere of the white dwarf due to the action of its magnetic field influences scattering processes. The second group of objects displays an increase in the degrees of both linear and circular polarization with wavelength, providing evidence for the presence of protoplanetary disks around these magnetic white dwarfs, in which the alignment of circumstellar grains leads to the observed behavior.

作者简介

V. Afanas’ev

Special Astrophysical Observatory

Email: mpiotrovich@mail.ru
俄罗斯联邦, Nizhnii Arkhyz, Karachaevo–Cherkesskaya Republic, 357169

M. Piotrovich

Central (Pulkovo) Astronomical Observatory

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Email: mpiotrovich@mail.ru
俄罗斯联邦, St. Petersburg, 196140

Yu. Gnedin

Central (Pulkovo) Astronomical Observatory

Email: mpiotrovich@mail.ru
俄罗斯联邦, St. Petersburg, 196140

S. Buliga

Central (Pulkovo) Astronomical Observatory

Email: mpiotrovich@mail.ru
俄罗斯联邦, St. Petersburg, 196140

T. Natsvlishvili

Central (Pulkovo) Astronomical Observatory

Email: mpiotrovich@mail.ru
俄罗斯联邦, St. Petersburg, 196140

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