Cosmic ray production and emission in M82

被引：0

作者：

Yoast-Hull, Tova ^{[1
]}

Everett, John ^{[1
,2
]}

Gallagher, J. S., III ^{[2
]}

Zweibel, Ellen ^{[1
,2
]}

机构：

[1] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA

[2] Univ Wisconsin, Dept Astron, Madison, WI 53706 USA

来源：

SPECTRAL ENERGY DISTRIBUTION OF GALAXIES | 2012年 / 284期

关键词：

galaxies: individual (M82); galaxies: starburst; cosmic rays; gamma rays: theory; radio continuum: galaxies;

D O I：

10.1017/S1743921312009490

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Starting from first principles, we construct a simple model for the evolution of energetic particles produced by supernovae in the starburst galaxy M82. The supernova rate, geometry, and properties of the interstellar medium are all well observed in this nearby galaxy. Assuming a uniform interstellar medium and constant cosmic-ray injection rate, we estimate the cosmic-ray proton and primary & secondary electron/positron populations. From these particle spectra, we predict the gamma ray flux and the radio synchrotron spectrum. The model is then compared to the observed radio and gamma-ray spectra of M82 as well as previous models by Torres (2004), Persic et al. (2008), and de Cea del Pozo et al. (2009). Through this project, we aim to build a better understanding of the calorimeter model, in which energetic particle fluxes reflect supernova rates, and a better understanding of the radio-FIR, correlation in galaxies.

引用

页码：397 / +

页数：2