Inverse Compton origin of the hard X-ray and soft gamma-ray emission from the Galactic ridge

被引：192

作者：

Porter, Troy A. ^{[1
]}

Moskalenko, Igor V. ^{[2
,3
]}

Strong, Andrew W. ^{[4
]}

Orlando, Elena ^{[4
]}

机构：

[1] Univ Calif Santa Cruz, Santa Cruz Inst Particle Phys, Santa Cruz, CA 95064 USA

[2] Stanford Univ, Hansen Expt Phys Lab, Stanford, CA 94305 USA

[3] Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, Stanford, CA 94309 USA

[4] Max Planck Inst Extraterr Phys, D-85741 Garching, Germany

来源：

ASTROPHYSICAL JOURNAL | 2008年 / 682卷 / 01期

关键词：

cosmic rays; elementary particles; gamma rays : theory;

D O I：

10.1086/589615

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A recent redetermination of the nonthermal component of the hard X-ray to soft gamma-ray emission from the Galactic ridge, using the SPI instrument on the International Gamma-Ray Astrophysics Laboratory (INTEGRAL), is shown to be well reproduced as inverse Compton emission from the interstellar medium. Both cosmic-ray primary electrons and secondary electrons and positrons contribute to the emission. The prediction uses the GALPROP model and includes a new calculation of the interstellar radiation field. This may solve a long- standing mystery of the origin of this emission, and potentially opens a new window on Galactic cosmic rays.

引用

页码：400 / 407

页数：8

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