Physics
Scientific paper
Jul 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icrc....4.2505r&link_type=abstract
Proceedings of the 28th International Cosmic Ray Conference. July 31-August 7, 2003. Trukuba, Japan. Under the auspices of the I
Physics
3
Scientific paper
Recently, high energy photons up to TeV-energies have been detected from the direction of regions harb oring massive star populations at high number density that produce intense hot radiation fields. The transparancy of γ -ray propagation in this environment may be rendered by photon absorption in γ γ collisions causing pair production. In this paper I study the escape probability of γ -rays in the vicinity of early-type stars and in the Cyg OB2 complex as an example of a rich aggregate of massive stars. I demonstrate that γ -rays can in general not escape the base of winds from early type stars (with temperatures > 15000K). Even at distances that are typical for the location of colliding wind regions in massive binaries γ -ray absorption is shown to be non-negligible. Though γ -ray propagation in the Cyg OB2 complex is found to be not strongly affected by γ γ collisions, the collective effects of the stellar radiation fields in dense stellar clusters can in general significantly enhance the photon density which may lead to substantial underestimates of the photon absorption probability if not taken into account.
No associations
LandOfFree
High Energy Photon Absorption in Hot Stellar Radiation Fields 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 High Energy Photon Absorption in Hot Stellar Radiation Fields, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High Energy Photon Absorption in Hot Stellar Radiation Fields will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1141709