Gamma-ray astronomy and the local interstellar medium

Details Gamma-ray astronomy and the local interstellar medium Gamma-ray astronomy and the local interstellar medium

Mar 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...266..276l&link_type=abstract

Astrophysical Journal, Part 1, vol. 266, Mar. 1, 1983, p. 276-286.

Astronomy and Astrophysics

Astronomy

24

Cosmic Dust, Energetic Particles, Gamma Ray Astronomy, Interstellar Gas, Cosmic Rays, Interstellar Extinction, Interstellar Matter, Molecular Gases, Particle Interactions

Scientific paper

Gamma-ray intensity and interstellar absorption derived from galaxy counts are used to explore the local interstellar medium. It is pointed out that both are valuable tracers of column density of the total gas: gamma-rays as they relate to interaction between high-energy particles and interstellar gas in all its forms, interstellar absorption in the context of the gas-to-dust relationship. Large scale features of the local interstellar medium are revealed, in particular a wide concentration of nearby molecular gas in the Aquila-Ophiuchus-Sagittarius region. The overall relation between gas and gamma-radiation is used to derive quantitative estimates of the cosmic-ray electron flux and spectrum below 1 GeV.

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