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

Farhad Yusef-Zadeh

doi:10.1007/978-3-642-35410-6_25

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

Farhad Yusef-Zadeh^*

^*Corresponding author for this work

Physics and Astronomy

Research output: Chapter in Book/Report/Conference proceeding › Conference 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 language	English (US)
Title of host publication	Cosmic Rays in Star-Forming Environments - Proceedings of the 2nd Session of the Sant Cugat Forum on Astrophysics
Editors	Olaf Reimer, Diego F. Torres
Publisher	Springer Netherlands
Pages	325-330
Number of pages	6
Volume	34
ISBN (Print)	9783642354090
DOIs	https://doi.org/10.1007/978-3-642-35410-6_25
State	Published - Jan 1 2013
Event	2nd Workshop on cosmic-ray induced phenomenology in star-forming environments, 2012 - Catalonia, Spain Duration: Apr 16 2012 → Apr 19 2012

Other

Other	2nd Workshop on cosmic-ray induced phenomenology in star-forming environments, 2012
Country/Territory	Spain
City	Catalonia
Period	4/16/12 → 4/19/12

ASJC Scopus subject areas

General Physics and Astronomy
Computer Science Applications
Spectroscopy
Space and Planetary Science
Nuclear and High Energy Physics

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10.1007/978-3-642-35410-6_25

Cite this

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title = "The consequences of the interaction of cosmic rays with galactic center molecular clouds",

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.",

author = "Farhad Yusef-Zadeh",

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Yusef-Zadeh, F 2013, The consequences of the interaction of cosmic rays with galactic center molecular clouds. in O Reimer & DF Torres (eds), Cosmic Rays in Star-Forming Environments - Proceedings of the 2nd Session of the Sant Cugat Forum on Astrophysics. vol. 34, Springer Netherlands, pp. 325-330, 2nd Workshop on cosmic-ray induced phenomenology in star-forming environments, 2012, Catalonia, Spain, 4/16/12. https://doi.org/10.1007/978-3-642-35410-6_25

The consequences of the interaction of cosmic rays with galactic center molecular clouds. / Yusef-Zadeh, Farhad.
Cosmic Rays in Star-Forming Environments - Proceedings of the 2nd Session of the Sant Cugat Forum on Astrophysics. ed. / Olaf Reimer; Diego F. Torres. Vol. 34 Springer Netherlands, 2013. p. 325-330.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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N2 - 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.

AB - 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.

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

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