Origin of 6.4 keV Line Emission from Molecular Clouds in the Galactic Center

Vladimir Dogiel, Kwong Sang Cheng, Dmitrii Chernyshov, Aya Bamba, Atsushi Ichimura, Hajime Inoue, Chung Ming Ko, Motohide Kokubun, Yoshitomo Maeda, Kazuhisa Mitsuda, Noriko Y. Yamasaki

Research output: Contribution to journalArticlepeer-review

38 Scopus citations


We analyze the 6.4 keV line and continuum emission from the molecular cloud SgrB2 and the source HESS J1745-303, which is supposed to be a complex of molecular gas. From the HESS results it follows that Sgr A* is a source of high energy protons, which penetrate into molecular clouds producing there a TeV gamma-ray flux. We present arguments that Sgr A may also produce a flux of subrelativistic protons which generate the 6.4 keV line and bremsstrahlune continuum emission from the clouds.

Original languageEnglish
Pages (from-to)901-907
Number of pages7
JournalPublications of the Astronomical Society of Japan
Issue number4
StatePublished - 2009


  • Galaxy: center
  • ISM: molecular clouds: cosmic rays
  • X-rays: diffuse background


Dive into the research topics of 'Origin of 6.4 keV Line Emission from Molecular Clouds in the Galactic Center'. Together they form a unique fingerprint.

Cite this