The consequences of the interaction of cosmic rays with galactic center molecular clouds

Farhad Yusef-Zadeh*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

We consider that the diffuse GeV, TeV and the FeI 6.4 keV line emission from the inner 20 × 10 of the Galactic center, as observed with Fermi, HESS, Chandra, XMM-Newton and Suzaku, results from the interaction of cosmic ray electrons with the neutral gas and that the emission can be explained in the context of nonthermal bremsstrahlung mechanism. Synchrotron radio emission from this region is measured from multi-frequency radio continuum observations of the Galactic center using the Green Bank Telescope. The interaction of low energy cosmic ray electrons with the gas in the Galactic center infer high values of cosmic ray ionization, heating rates as well as strong FeI Kα line emission at 6.4 keV. The high energy tail of cosmic ray particles interacting with neutral gas produces nonthermal bremsstrahlung emission at GeV γ-rays. The spectrum of diffuse γ-ray emission detected by Fermi reflects the energy distribution of electrons producing radio synchrotron emission from the Galactic center.

Original languageEnglish (US)
Title of host publicationCosmic Rays in Star-Forming Environments - Proceedings of the 2nd Session of the Sant Cugat Forum on Astrophysics
EditorsOlaf Reimer, Diego F. Torres
PublisherSpringer Netherlands
Pages325-330
Number of pages6
Volume34
ISBN (Print)9783642354090
DOIs
StatePublished - Jan 1 2013
Event2nd Workshop on cosmic-ray induced phenomenology in star-forming environments, 2012 - Catalonia, Spain
Duration: Apr 16 2012Apr 19 2012

Other

Other2nd Workshop on cosmic-ray induced phenomenology in star-forming environments, 2012
Country/TerritorySpain
CityCatalonia
Period4/16/124/19/12

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Computer Science Applications
  • Spectroscopy
  • Space and Planetary Science
  • Nuclear and High Energy Physics

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