Astronomy and Astrophysics – Astrophysics
Scientific paper
1999-08-27
New Astron.Rev. 46 (2002) 381-385
Astronomy and Astrophysics
Astrophysics
7 pages, 1 figure; to appear in Life Cycles of Radio Galaxies, ed. J. Biretta et al., New Astronomy Reviews
Scientific paper
10.1016/S1387-6473(02)00147-1
We have developed an economical, effective numerical scheme for cosmic-ray transport suitable for treatment of electrons up to a few hundreds of GeV in multidimensional simulations of radio galaxies. The method follows the electron population in sufficient detail to allow computation of synthetic radio and X-ray observations of the simulated sources, including spectral properties (see the companion paper by Tregillis et al. 1999). The cosmic-ray particle simulations can follow the effects of shock acceleration, second-order Fermi acceleration as well as radiative and adiabatic energy losses. We have applied this scheme to 2-D and 3-D MHD simulations of jet-driven flows and have begun to explore links between dynamics and the properties of high energy electron populations in radio lobes. The key initial discovery is the great importance to the high energy particle population of the very unsteady and inhomogeneous flows, especially near the end of the jet. Because of this, in particular, our simulations show that a large fraction of the particle population flowing from the jet into the cocoon never passes through strong shocks. The shock strengths encountered are not simply predicted by 1-D models, and are quite varied. Consequently, the emergent electron spectra are highly heterogeneous. Rates of synchrotron aging in "hot-spots" seem similarly to be very uneven, enhancing complexity in the spectral properties of electrons as they emerge into the lobes and making more difficult the task of comparing dynamical and radiative ages.
Jones Thomas W.
Ryu Dongsu
Tregillis Ian Lee
No associations
LandOfFree
Simulations of Nonthermal Electron Transport in Multidimensional Flows: Application to Radio Galaxies 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 Simulations of Nonthermal Electron Transport in Multidimensional Flows: Application to Radio Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Simulations of Nonthermal Electron Transport in Multidimensional Flows: Application to Radio Galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-96175