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Paper: Spectropolarimetric Observations of Magnetic White Dwarfs with the SAO 6-m Telescope: Search for Rydberg States
Volume: 518, Physics of Magnetic Stars
Page: 93
Authors: Piotrovich, M. Y.; Afanasiev, V. L.; Gnedin, Y. N.; Buliga, S. D.; Natsvlishvili, T. M.
Abstract: The results of the spectropolarimetric observations of a number of magnetic white dwarfs obtained on the 6-m optical telescope of the Special Astrophysical Observatory are presented. 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.
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