40 research outputs found
Compton scattering S-matrix and cross section in strong magnetic field
Compton scattering of polarized radiation in a strong magnetic field is considered. The recipe for calculation of the scattering matrix elements, the differential and total cross sections based on quantum electrodynamic (QED) second order perturbation theory is presented for the case of arbitrary initial and final Landau level, electron momentum along the field and photon momentum. Photon polarization and electron spin state are taken into account. The correct dependence of natural Landau level width on the electron spin state is taken into account in general case of arbitrary initial photon momentum for the first time. A number of steps in calculations were simplified analytically making the presented recipe easy-to-use. The redistribution functions over the photon energy, momentum and polarization states are presented and discussed. The paper generalizes already known results and offers a basis for accurate calculation of radiation transfer in strong B-field, for example, in strongly magnetized neutron stars.</p
Broad-band aperiodic variability in X-ray pulsars:accretion rate fluctuations propagating under the influence of viscous diffusion
Spectrum formation in X-ray pulsars at very low mass accretion rate: Monte Carlo approach
Large scale structure and cosmolog
Losing a minute every two years: SRG X-ray view of the rapidly accelerating X-ray pulsar SXP 1323
High Energy Astrophysic
Constraints on the magnetic field structure in accreting compact objects from aperiodic variability
Galaxie
First characterization of a new high-mass X-ray binary in LMC eRASSU J050810.4-660653 with SRG/ART-XC, NuSTAR, and Swift
Galaxie
SRG/ART-XC, Swift, NICER, and NuSTAR study of different states of the transient X-ray pulsar MAXI J0903-531
High Energy Astrophysic