Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-02-27
Astrophys.J. 606 (2004) L1-L4
Astronomy and Astrophysics
Astrophysics
4 pages, 3 figures. submitted to ApJL
Scientific paper
10.1086/420896
This Letter explores influences of intracluster magnetic fields ($\gsim 1\mu$G) submerged in the hot electron gas on classic Sunyaev-Zel'dovich effect (SZE) and thermal bremsstrahlung in X-ray emissions. As the Larmor frequency is much higher than all collision frequencies, the presence of magnetic field may lead to an anisotropic velocity distribution of hot electrons. For the two-temperature relativistic Maxwell-Boltzmann distribution, we compute modifications to the classical thermal SZE. Intracluster magnetic fields tend to enhance the SZE with steeper radial variations, which bear important consequences for cluster-based estimates of cosmological parameters. By applying the magnetic SZE theory to spectral observations of SZ and Chandra X-ray emissions from the galaxy cluster Abell 2163, a $\sim 30-40\mu$G central core magnetic field $B_0$ is predicted. For the SZ and Chandra X-ray spectral observations of the Coma cluster, our theoretical analysis is also consistent with an observationally inferred $B_0\lsim 10\mu$G. As the magnetic SZE is redshift $z$ independent, this mechanism might offer a potentially important and unique way of probing intracluster magnetic fields in the expanding universe.
Hu Jianbin
Lou Yu-Qing
No associations
LandOfFree
Magnetic Sunyaev-Zel'dovich effect in galaxy clusters 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 Magnetic Sunyaev-Zel'dovich effect in galaxy clusters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic Sunyaev-Zel'dovich effect in galaxy clusters will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-293661