Anisotropic Photon and Electron Scattering without Ultrarelativistic Approximation
Update: 2022-11-30
Description
Anisotropic Photon and Electron Scattering without Ultrarelativistic Approximation by Anderson C. M. Lai et al. on Wednesday 30 November
Interactions between photons and electrons are ubiquitous in astrophysics.
Photons can be down scattered (Compton scattering) or up scattered (inverse
Compton scattering) by moving electrons. Inverse Compton scattering, in
particular, is an essential process for the production of astrophysical gamma
rays. Computations of inverse Compton emission typically adopts an isotropic or
an ultrarelativistic assumption to simplify the calculation, which makes them
unable to broadcast the formula to the whole phase space of source particles.
In view of this, we develop a numerical scheme to compute the interactions
between anisotropic photons and electrons without taking ultrarelativistic
approximations. Compared to the ultrarelativistic limit, our exact results show
major deviations when target photons are down scattered or when they possess
energy comparable to source electrons. We also consider two test cases of
high-energy inverse Compton emission to validate our results in the
ultrarelativistic limit. In general, our formalism can be applied to cases of
anisotropic electron-photon scattering in various energy regimes, and for
computing the polarizations of the scattered photons.
arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.15691v1
Interactions between photons and electrons are ubiquitous in astrophysics.
Photons can be down scattered (Compton scattering) or up scattered (inverse
Compton scattering) by moving electrons. Inverse Compton scattering, in
particular, is an essential process for the production of astrophysical gamma
rays. Computations of inverse Compton emission typically adopts an isotropic or
an ultrarelativistic assumption to simplify the calculation, which makes them
unable to broadcast the formula to the whole phase space of source particles.
In view of this, we develop a numerical scheme to compute the interactions
between anisotropic photons and electrons without taking ultrarelativistic
approximations. Compared to the ultrarelativistic limit, our exact results show
major deviations when target photons are down scattered or when they possess
energy comparable to source electrons. We also consider two test cases of
high-energy inverse Compton emission to validate our results in the
ultrarelativistic limit. In general, our formalism can be applied to cases of
anisotropic electron-photon scattering in various energy regimes, and for
computing the polarizations of the scattered photons.
arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.15691v1
Comments
In Channel
Download from Google Play
Download from App Store
United States00:00
00:00
1.0x
