Rotating black holes dressed with cored-NFW dark matter produce larger image shifts, brightness asymmetries, and ring-scale changes than Kerr or Einasto-dressed cases, with partial degeneracy to spin and inclination.
A public code for general relativistic, polarised radiative transfer around spinning black holes
3 Pith papers cite this work. Polarity classification is still indexing.
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abstract
Ray tracing radiative transfer is a powerful method for comparing theoretical models of black hole accretion flows and jets with observations. We present a public code, grtrans, for carrying out such calculations in the Kerr metric, including the full treatment of polarised radiative transfer and parallel transport along geodesics. The code is written in Fortran 90 and efficiently parallelises with OpenMP, and the full code and several components have Python interfaces. We describe several tests which are used for verifiying the code, and we compare the results for polarised thin accretion disc and semi-analytic jet problems with those from the literature as examples of its use. Along the way, we provide accurate fitting functions for polarised synchrotron emission and transfer coefficients from thermal and power law distribution functions, and compare results from numerical integration and quadrature solutions of the polarised radiative transfer equations. We also show that all transfer coefficients can play an important role in predicted images and polarisation maps of the Galactic center black hole, Sgr A*, at submillimetre wavelengths.
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UNVERDICTED 3representative citing papers
Horizon-scale synchrotron images and polarization maps of Konoplya-Zhidenko black holes with thick disks show expanded photon rings, darker centers, and viewing-angle-dependent asymmetries that vary with the deformation parameter.
Polarization signatures from GRMHD simulations of black hole accretion can help probe disk, corona, and jet properties when combined with X-ray polarimetry observations.
citing papers explorer
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Adaptive ray tracing, image diagnostics, and photon ring signatures of rotating dark-matter-dressed black holes
Rotating black holes dressed with cored-NFW dark matter produce larger image shifts, brightness asymmetries, and ring-scale changes than Kerr or Einasto-dressed cases, with partial degeneracy to spin and inclination.
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Imaging and Polarimetric Signatures of Konoplya-Zhidenko Black Holes with Various Thick Disk
Horizon-scale synchrotron images and polarization maps of Konoplya-Zhidenko black holes with thick disks show expanded photon rings, darker centers, and viewing-angle-dependent asymmetries that vary with the deformation parameter.
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Polarization Signatures from GRMHD Simulations of Black Hole Accretion
Polarization signatures from GRMHD simulations of black hole accretion can help probe disk, corona, and jet properties when combined with X-ray polarimetry observations.