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

doi:10.1093/pasj/61.4.901

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

Graduate Institute of Astronomy

Research output: Contribution to journal › Article › peer-review

38 Scopus citations

Abstract

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 language	English
Pages (from-to)	901-907
Number of pages	7
Journal	Publications of the Astronomical Society of Japan
Volume	61
Issue number	4
DOIs	https://doi.org/10.1093/pasj/61.4.901
State	Published - 2009

Keywords

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

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title = "Origin of 6.4 keV Line Emission from Molecular Clouds in the Galactic Center",

abstract = "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.",

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

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TY - JOUR

T1 - Origin of 6.4 keV Line Emission from Molecular Clouds in the Galactic Center

AU - Dogiel, Vladimir

AU - Cheng, Kwong Sang

AU - Chernyshov, Dmitrii

AU - Bamba, Aya

AU - Ichimura, Atsushi

AU - Inoue, Hajime

AU - Ko, Chung Ming

AU - Kokubun, Motohide

AU - Maeda, Yoshitomo

AU - Mitsuda, Kazuhisa

AU - Yamasaki, Noriko Y.

PY - 2009

Y1 - 2009

N2 - 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.

AB - 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.

KW - Galaxy: center

KW - ISM: molecular clouds: cosmic rays

KW - X-rays: diffuse background

UR - http://www.scopus.com/inward/record.url?scp=70349637140&partnerID=8YFLogxK

U2 - 10.1093/pasj/61.4.901

DO - 10.1093/pasj/61.4.901

M3 - 期刊論文

AN - SCOPUS:70349637140

VL - 61

SP - 901

EP - 907

JO - Publications of the Astronomical Society of Japan

JF - Publications of the Astronomical Society of Japan

SN - 0004-6264

IS - 4

ER -

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

Abstract

Keywords

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