Origin of Thermal and Non-Thermal Hard X-Ray Emission from the Galactic Center

被引：14

作者：

Dogiel, Vladimir A. ^{[1
,2
]}

Chernyshov, Dmitrii O. ^{[2
,3
]}

Yuasa, Takayuki ^{[4
]}

Prokhorov, Dmitrii ^{[3
,5
]}

Cheng, Kwong-Sang ^{[6
]}

Bamba, Aya ^{[1
]}

Inoue, Hajime ^{[1
]}

Ko, Chung-Ming ^{[7
]}

Kokubun, Motohide ^{[1
]}

Maeda, Yoshitomo ^{[1
]}

Mitsuda, Kazuhisa ^{[1
]}

Nakazawa, Kazuhiro ^{[4
]}

Yamasaki, Noriko Y. ^{[1
]}

机构：

[1] Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Sagamihara, Kanagawa 2298510, Japan

[2] PN Lebedev Phys Inst, Moscow 119991, Russia

[3] Moscow Inst Phys & Technol, Dolgoprudnyi 141700, Russia

[4] Univ Tokyo, Dept Phys, Sch Sci, Bunkyo Ku, Tokyo 1130033, Japan

[5] Univ Paris 06, CNRS, Inst Astrophys Paris, UMR 7095, F-75014 Paris, France

[6] Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China

[7] Natl Cent Univ, Inst Astron, Jhongli 320, Taiwan

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN | 2009年 / 61卷 / 05期

关键词：

Galaxy: center; ISM: cosmic rays; X-rays: diffuse background; IRON LINE; RIDGE; SUZAKU; DISK; NUCLEI; GALAXY; VIEW; FLUX;

D O I：

10.1093/pasj/61.5.1099

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We analyse new results of Chandra and Suzaku Observatories which found a flux of hard X-ray emission from the compact region around Sgr A* (r similar to 100pc). We suppose that this emission is generated by accretion processes onto the central supermassive blackhole when an unbound part of captured stars obtains an additional momentum. As a result a flux of subrelativistic protons is generated near the galactic center which heats the background plasma up to temperatures about 6-10keV and produces by inverse bremsstrahlung a flux of non-thermal X-ray emission in the energy range above 10 keV.

引用

页码：1099 / 1105

页数：7

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