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We present a series of numerical models suitable for X-ray polarimetry of accreting systems. Firstly, we provide a spectropolarimetric routine that integrates reflection from inner optically thick walls of a geometrical torus of arbitrary…

High Energy Astrophysical Phenomena · Physics 2024-04-09 J. Podgorný , M. Dovčiak , F. Marin

We employ the transfer matrix approach combined with the Green's function method to theoretically study polarization resolved far-field angular distributions of photoluminescence from quantum nanorods (NRs) embedded in an anisotropic…

Optics · Physics 2019-09-12 Alexei D. Kiselev

A statistical model is used to determine how stochastic fluctuations in the intensities of orthogonal polarization modes contribute to the modulation and depolarization of pulsar radio emission. General expressions for the distributions of…

High Energy Astrophysical Phenomena · Physics 2023-12-19 M. M. McKinnon

Determination of a magnetic field structure on a neutron star (NS) surface is an important problem of a modern astrophysics. In a presence of strong magnetic fields a thermal conductivity of a degenerate matter is anisotropic. In this paper…

High Energy Astrophysical Phenomena · Physics 2020-08-05 Ilya A. Kondratyev , Sergey G. Moiseenko , Gennady S. Bisnovatyi-Kogan , Maria V. Glushikhina

Theoretical modeling of surface emission from magnetized neutron stars (NSs) requires proper treatment of QED effects, in particular the effect of photon mode conversion due to the ``vacuum resonance'' between plasma and vacuum…

Astrophysics · Physics 2009-11-11 Matthew van Adelsberg , Dong Lai

Our previous paper outlined the general aspects of the theory of radio light curve and polarization formation for pulsars. We predicted the one-to-one correspondence between the tilt of the linear polarization position angle of the and the…

High Energy Astrophysical Phenomena · Physics 2017-06-21 Hayk Hakobyan , Vasily Beskin , Alexander Philippov

Radio polarization measurements of pulsed emission from pulsars offer a valuable insight into the basic geometry of the neutron star: inclination angle between the magnetic and rotation axis and inclination of the line of sight. So far, all…

High Energy Astrophysical Phenomena · Physics 2017-01-11 J. Pétri

To derive physical properties of the neutron star surface with observed spectra, a realistic model spectrum of neutron star surface emission is essential. Limited by computing resources, a full computation of the radiative transfer…

Astrophysics · Physics 2007-05-23 L. W. Yeh , G. T. Chen , H. K. Chang

We introduce a new, publicly available Monte Carlo radiative transfer code, STOKES, which has been developed to model polarization induced by scattering off free electrons and dust grains. It can be used in a wide range of astrophysical…

Astrophysics · Physics 2009-11-13 Rene W. Goosmann , C. Martin Gaskell , M. Shoji

We investigate the spectrum and polarization of radiation emerging from a subcritical X-ray pulsar using self-consistent radiation-hydrodynamic simulations of an accretion channel in a strong magnetic field. The polarized radiative transfer…

High Energy Astrophysical Phenomena · Physics 2026-05-08 I. D. Markozov , A. Y. Potekhin , A. D. Kaminker , A. A. Mushtukov

The polarization of x-rays plays an outstanding role in experimental techniques such as non-resonant magnetic x-ray scattering and resonant x-ray scattering of magnetic and multipolar order. Different instrumental methods applied to…

Strongly Correlated Electrons · Physics 2014-09-24 C. Detlefs , M. Sanchez del Rio , C. Mazzoli

Polarizability tensor of a strongly magnetized plasma and the polarization vectors and opacities of normal electromagnetic waves are studied for the conditions typical of neutron star atmospheres, taking account of partial ionization…

Astrophysics · Physics 2009-11-10 A. Y. Potekhin , Dong Lai , G. Chabrier , W. C. G. Ho

We utilize the Monte Carlo radiation transport code, Pandurata, to create images, spectra, polarization maps, and light curves from a set of general relativistic magnetohydrodynamic simulations of tilted, truncated, black hole accretion…

High Energy Astrophysical Phenomena · Physics 2025-08-26 P. Chris Fragile , Deepika A. Bollimpalli , Jeremy D. Schnittman , Cesare Harvey

Aims: We present POLARIS (POLArized RadIation Simulator), a newly developed three-dimensional Monte-Carlo radiative transfer code. POLARIS was designed to calculate dust temperature, polarization maps, and spectral energy distributions. It…

Instrumentation and Methods for Astrophysics · Physics 2016-09-28 Stefan Reissl , Sebastian Wolf , Robert Brauer

We consider two phase accretion disk-corona models for active galactic nuclei and some X-ray binaries. We describe in detail how one can exactly solve the polarized radiative transfer and Comptonization using the iterative scattering…

Astrophysics · Physics 2009-10-28 Juri Poutanen , Roland Svensson

Despite some success in explaining the observed polarisation angle swing of radio pulsars within the geometric rotating vector model, many deviations from the expected S-like swing are observed. In this paper we provide a simple and…

Solar and Stellar Astrophysics · Physics 2009-11-13 A. Karastergiou

The magnetosphere of strongly magnetized neutron stars, such as magnetars, can sustain large electric currents. The charged particles return to the surface with large Lorentz factors, producing a particle bombardment. We investigate the…

High Energy Astrophysical Phenomena · Physics 2018-12-12 Denis Gonzalez-Caniulef , Silvia Zane , Roberto Turolla , Kinwah Wu

This article investigates the full Boltzmann equation up to second order in the cosmological perturbations. Describing the distribution of polarized radiation by using a tensor valued distribution function, the second order Boltzmann…

Astrophysics · Physics 2009-12-03 Cyril Pitrou

Emission spectra from magnetars in the soft X-ray band likely contain a thermal component emerging directly from the neutron star surface. However, the lack of observed absorption-like features in quiescent spectra makes it difficult to…

High Energy Astrophysical Phenomena · Physics 2015-05-13 Matthew van Adelsberg , Rosalba Perna

The numerical computation of reliable and accurate Stokes profiles is of great relevance in solar physics. In the synthesis process, many actors play a relevant role: among them the formal solver, the discrete atmospheric model, and the…

Solar and Stellar Astrophysics · Physics 2018-09-19 Gioele Janett , Oskar Steiner , Luca Belluzzi
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