Updated Transfer Coefficients for Magnetized Plasmas

TL;DR

This paper reviews and updates radiative transfer coefficients for magnetized plasmas, providing improved numerical methods and fitting formulas crucial for modeling radiation in relativistic astrophysical environments.

Contribution

It offers corrected and enhanced calculations of transfer coefficients, along with a new numerical approach and fitting formulas for relativistic electron distributions.

Findings

Updated radiative transfer coefficients for magnetized plasmas.

Improved numerical evaluation methods for rotativities.

Convenient fitting formulas for relativistic electron energy distributions.

Abstract

Accurate radiative transfer coefficients (emissivities, absorptivities, and rotativities) are needed for modeling radiation from relativistically hot, magnetized plasmas such as those found in Event Horizon Telescope sources. Here we review, update, and correct earlier work on radiative transfer coefficients. We also describe an improved method for numerically evaluating rotativities and provide convenient fitting formulae for the relativistic $\kappa$ distribution of electron energies.