Computer Science
Scientific paper
Feb 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992nascp3137..417c&link_type=abstract
In NASA. Goddard Space Flight Center, The Compton Observatory Science Workshop p 417-423 (SEE N92-21874 12-90)
Computer Science
1
Early Stars, Galactic Radiation, Gamma Ray Spectra, Gamma Rays, Massive Stars, Stellar Luminosity, Stellar Radiation, Stellar Winds, Compton Effect, Electron Scattering, High Energy Electrons, Ions, Particle Interactions, Photons, Protons, Relativistic Particles
Scientific paper
We propose a new class of galactic discrete gamma-ray sources, the chaotic, high mass-loss-rate winds from luminous early-type stars. Early-type stellar winds are highly unstable due to intrinsic line-driven instabilities, and so are permeated by numerous strong shocks. These shocks can accelerate a small fraction of thermal electrons and ions to relativistic energies via the first-order Fermi mechanism. A power-law-like photon spectrum extending from keV to above 10 MeV energies is produced by inverse Compton scattering of the extremely abundant stellar UV photons by the relativistic electrons. In addition, a typical pi0-decay gamma-ray spectrum is generated by proton-ion interactions in the densest part of the winds.
Chen Wan
White Richard L.
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