Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2011-03-22
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
11 pages, 2 figures, 1 table, submitted to Physical Review D
Scientific paper
We study the inverse Compton scattering of the CMB photons off nonthermal high-energy electrons. In the previous study, assuming the power-law distribution for electrons, we derived the analytic expression for the spectral intensity function $I(\omega)$ in the Thomson approximation, which was applicable up to the photon energies of $\omega <$ O(GeV). In the present paper, we extend the previous work to higher photon energies of $\omega >$ O(GeV) by taking into account the terms dropped in the Thomson approximation, i.e., the Klein-Nishina formula. The analytic expression for $I(\omega)$ is derived with the Klein-Nishina formula. It is shown that $I(\omega)$ has a "knee" structure at $\omega =$ O(PeV). The knee, if exists, should be accessible with gamma-ray observatories such as Fermi-LAT. We propose simple analytical formulae for $I(\omega)$ which are applicable to wide photon energies from Thomson region to extreme Klein-Nishina region.
Itoh Naoki
Kohyama Yasuharu
Nozawa Satoshi
No associations
LandOfFree
Knee structure in high-energy inverse Compton scattering of CMB photons does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Knee structure in high-energy inverse Compton scattering of CMB photons, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Knee structure in high-energy inverse Compton scattering of CMB photons will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-49207