English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Ray tracing radiative transfer is a powerful method for comparing theoreticalmodels of black hole accretion flows and jets with observations. We present apublic code, grtrans, for carrying out such calculations in the Kerr metric,including the full treatment of polarised radiative transfer and paralleltransport along geodesics. The code is written in Fortran 90 and efficientlyparallelises with OpenMP, and the full code and several components have Pythoninterfaces. We describe several tests which are used for verifiying the code,and we compare the results for polarised thin accretion disc and semi-analyticjet problems with those from the literature as examples of its use. Along theway, we provide accurate fitting functions for polarised synchrotron emissionand transfer coefficients from thermal and power law distribution functions,and compare results from numerical integration and quadrature solutions of thepolarised radiative transfer equations. We also show that all transfercoefficients can play an important role in predicted images and polarisationmaps of the Galactic center black hole, Sgr A*, at submillimetre wavelengths.

A public code for general relativistic, polarised radiative transfer around spinning black holes