Cosmic-Ray induced diffuse emissions from the Milky Way and Local Group galaxies

被引:0
作者
Porter, Troy A. [1 ]
机构
[1] Stanford Univ, Hansen Expt Phys Lab, Stanford, CA 94305 USA
来源
SPECTRAL ENERGY DISTRIBUTION OF GALAXIES | 2012年 / 284期
关键词
radiation mechanisms: general; radiation mechanisms: nonthermal; (ISM:) cosmic rays; ISM: magnetic fields; galaxies: ISM; (galaxies:) Local Group; (galaxies:) Magellanic Clouds; gamma rays: observations; infrared: galaxies; radio continuum: galaxies; DISK GALAXIES; GAMMA-RAYS; RADIO; PROPAGATION;
D O I
10.1017/S1743921312009428
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Cosmic rays fill up the entire volume of galaxies, providing an important source of heating and ionisation of the interstellar medium, and may play a significant role in the regulation of star formation and galactic evolution. Diffuse emissions from radio to high-energy gamma-rays (>100 MeV) arising from various interactions between cosmic rays and the interstellar medium, interstellar radiation field, and magnetic field, are currently the best way to trace the intensities and spectra of cosmic rays in the Milky Way and other galaxies. In this contribution, I describe our recent work to model the full spectral energy distribution of galaxies like the Milky Way from radio to gamma-ray energies. The application to other galaxies, in particular the Magellanic Clouds and M31 that are now resolved in high-energy gamma-rays by the Fermi-LAT, is also discussed.
引用
收藏
页码:360 / 364
页数:5
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