The implications of ultra-high-energy activity in X-ray binary systems

Details The implications of ultra-high-energy activity in X-ray binary systems The implications of ultra-high-energy activity in X-ray binary systems

Nov 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...169..373m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 169, no. 1-2, Nov. 1986, p. 373-379.

Astronomy and Astrophysics

Astrophysics

12

Energetic Particles, Gamma Ray Spectra, Pair Production, Stellar Spectra, X Ray Binaries, Electron-Positron Pairs, High Energy Interactions, Neutron Stars, Pions, Stellar Luminosity

Scientific paper

A mechanism for producing the high energy γ-ray spectrum of X-ray binaries exhibiting ultra-high-energy activity is proposed. γ-rays can result from decay of π0 produced in collisions of energetic protons with the keV ambient photons. Consequently, the X-ray photons modify the produced primary spectrum by selectively absorbing the lower energy part of it. As a result of this differential absorption these systems should exhibit a power law spectrum of index 1.5 - 2.0. Moreover, these systems should have a high electron-positron pair number density that will lead to 511 keV annihilation line emission.

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