Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aipc..745..528m&link_type=abstract
HIGH ENERGY GAMMA-RAY ASTRONOMY: 2nd International Symposium on High Energy Gamma-Ray Astronomy. AIP Conference Proceedings, Vo
Astronomy and Astrophysics
Astronomy
Jets And Bursts, Galactic Winds And Fountains, Radio Galaxies, Cosmic Rays
Scientific paper
The present work discusses yield and transport of high-energy particle within extragalactic jet terminal shocks, also known as hotspots. These astrophysical sources are responsible for strong non-thermal synchrotron emission produced by relativistic electrons accelerated via a Fermi-type mechanism. We investigate in some details the cosmic ray, neutrinos and high-energy photons yield in hotspots of powerful FRII radio-galaxies by scanning all known spatial transport regimes, adiabatic and radiative losses as well as Fermi acceleration processes. Since both electrons and cosmic rays are prone to the same type of acceleration, we derive analytical estimates of the maximal cosmic ray energy attainable in both toroidal and poloidal magnetic field dominated shock structures by using observational data on synchrotron emission coming from various hot-spots. One of our main conclusions is that the best hot-spot candidates for high energy astroparticle production is the extended (LHS >= 1kpc), strongly magnetized (B > 0.1mG) terminal shock displaying synchrotron emission cut-off lying at least in the optical band. We found only one object (3C273A) over the six objects in our sample being capable to produce cosmic rays up to 1020 eV. We also show that the Bohm regime is unlikely to occur in the whole hot-spot since it would require unrealistically low jet velocities. We finally investigate the astroparticle yields of a characteric cosmic-ray loud hot-spot and compared them to the sensibilities of the future neutrinos and gamma-ray missions.
Casse Fabien
Marcowith Alexandre
No associations
LandOfFree
Astroparticle transport and yield in extragalactic jets and hot spots 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 Astroparticle transport and yield in extragalactic jets and hot spots, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Astroparticle transport and yield in extragalactic jets and hot spots will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1746503