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Paper: Future of X-Ray Astronomy: X-Ray Polarization of Stellar Mass Black Holes in Close Binary Systems
Volume: 510, Stars: From Collapse to Collapse
Page: 389
Authors: Gnedin, Yu. N.; Piotrovich, M. Yu.
Abstract: We discuss the perspectives of future polarimetric observations of cosmic objects in the X-ray spectral range. X-ray polarimetry is one of the perspective methods of X-ay astronomy. Since the first discovery of X-ray sources theory predicted a high degree of polarization that could be expected via electron scattering and non-thermal emission mechanisms. X-ray polarimetry is especially important for the X-ray binary systems. The compact objects in these systems are neutron stars, white dwarfs and black holes. Neutron stars and white dwarfs have their intrinsic magnetic fields. But the magnetic field can exist in the accretion disk around a black hole. We demonstrate that the results of the future polarimetric observations in the X-ray range allow to determine the magnetic field strength at the the radius of the innermost stable circular orbit and to determine the value of the black hole spin. The X-ray polarimetry allows also to obtain constraints on the electric charge value of a black hole.
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