Cosmic ray production and emission in M82

Tova Yoast-Hull; John Everett; J. S. Gallagher; Ellen Zweibel

doi:10.1017/S1743921312009490

Cosmic ray production and emission in M82

Tova Yoast-Hull^*, John Everett, J. S. Gallagher, Ellen Zweibel

^*Corresponding author for this work

CIERA - Center for Interdisciplinary Exploration and Research in Astrophysics

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

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.

Original language	English (US)
Title of host publication	The Spectral Energy Distribution of Galaxies
Editors	Richard J. Tuffs, Cristina C. Popescu
Pages	397-399
Number of pages	3
Edition	S284
DOIs	https://doi.org/10.1017/S1743921312009490
State	Published - Sep 1 2011

Publication series

Name	Proceedings of the International Astronomical Union
Number	S284
Volume	7
ISSN (Print)	1743-9213
ISSN (Electronic)	1743-9221

Keywords

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

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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Yoast-Hull, T., Everett, J., Gallagher, J. S., & Zweibel, E. (2011). Cosmic ray production and emission in M82. In R. J. Tuffs, & C. C. Popescu (Eds.), The Spectral Energy Distribution of Galaxies (S284 ed., pp. 397-399). (Proceedings of the International Astronomical Union; Vol. 7, No. S284). https://doi.org/10.1017/S1743921312009490

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abstract = "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.",

keywords = "cosmic rays, galaxies: individual (M82), galaxies: starburst, gamma rays: theory, radio continuum: galaxies",

author = "Tova Yoast-Hull and John Everett and Gallagher, {J. S.} and Ellen Zweibel",

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Cosmic ray production and emission in M82. / Yoast-Hull, Tova; Everett, John; Gallagher, J. S.; Zweibel, Ellen.

The Spectral Energy Distribution of Galaxies. ed. / Richard J. Tuffs; Cristina C. Popescu. S284. ed. 2011. p. 397-399 (Proceedings of the International Astronomical Union; Vol. 7, No. S284).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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AU - Zweibel, Ellen

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N2 - 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.

AB - 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.

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KW - galaxies: starburst

KW - gamma rays: theory

KW - radio continuum: galaxies

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