Free-Free Gaunt factors for atmospheres of accreting pulsars observable with X-ray space missions
Parisee S. Shirke
TL;DR
This paper provides updated Free-Free Gaunt factors for modeling X-ray absorption in hot plasma atmospheres of accreting pulsars, considering magnetic fields and non-LTE conditions, aiding future X-ray polarimetric observations.
Contribution
It introduces modified formulae for Free-Free Gaunt factors applicable to non-LTE conditions in magnetized pulsar atmospheres, facilitating polarized radiative transfer modeling.
Findings
Provides new Free-Free Gaunt factors for magnetized plasma
Enables construction of absorption matrices for polarized X-ray transfer
Supports upcoming X-ray polarimetric space missions
Abstract
Free-Free Gaunt factors for X-ray absorption by hot plasma in the presence of a strong magnetic field are reported. Modified formulae are used for application to the non-local thermodynamic equilibrium conditions found in accreting pulsar atmospheres. Given upcoming global X-ray polarimetric space missions, these can be used for the construction of an absorption matrix in discrete-ordinate polarised radiative transfer.
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