lnu.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Gamma rays from Fermi bubbles as due to diffusive injection of Galactic cosmic rays
Radboud University Nijmegen, The Netherlands.
2014 (English)In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 742, p. 224-227Article in journal (Refereed) Published
Resource type
Text
Abstract [en]

Recent detailed analysis of the Fermi-LAT data has discovered two giant γ-rayγ-ray emission regions, the so-called Fermi bubbles, extending up to ~50° in Galactic latitude above and below the Galactic center with a width of ~40° in longitude. The origin of the γ-rayγ-ray emission is not clearly understood. Here, we discuss the possibility that the γ-raysγ-rays can be the result of diffusive injection of Galactic cosmic-ray protons during their propagation through the Galaxy. In the model, we consider that the bubbles are slowly expanding, and cosmic rays undergo much slower diffusion inside the bubbles than in the averaged Galaxy. Moreover, we consider that cosmic rays inside the bubbles suffer losses from adiabatic expansion, and also from inelastic collisions with the bubble plasma producing pion-decay γ rays. We show that this simple model can explain some of the important properties of Fermi bubbles such as the measured γ-rayγ-ray intensity profile, the energy spectrum and the measured luminosity.

Place, publisher, year, edition, pages
2014. Vol. 742, p. 224-227
Keywords [en]
Cosmic rays, Diffusion, Galaxy, Gamma rays
National Category
Astronomy, Astrophysics and Cosmology
Research subject
Physics, Astroparticle Physics
Identifiers
URN: urn:nbn:se:lnu:diva-51551DOI: 10.1016/j.nima.2013.09.016OAI: oai:DiVA.org:lnu-51551DiVA, id: diva2:915306
Available from: 2016-03-29 Created: 2016-03-29 Last updated: 2017-11-30Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full text

Authority records BETA

Thoudam, Satyendra

Search in DiVA

By author/editor
Thoudam, Satyendra
In the same journal
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Astronomy, Astrophysics and Cosmology

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 16 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf