Theoretical Explanation of the Cosmic-Ray Perpendicular Diffusion Coefficient in the Nearby Starburst Galaxy NGC 253
Abstract
Diffusion coefficients are usually used to describe the propagation of cosmic rays through the universe. Whereas such transport parameters can be obtained from experiments in the solar system, it is difficult to determine diffusion coefficients in the Milky Way or in external galaxies. Recently, a value for the perpendicular diffusion coefficient in the nearby starburst galaxy NGC 253 has been proposed. In the present paper, we reproduce this value theoretically by using an advanced analytical theory for perpendicular diffusion.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- February 2013
- DOI:
- 10.1088/0004-637X/764/1/37
- arXiv:
- arXiv:1212.5721
- Bibcode:
- 2013ApJ...764...37B
- Keywords:
-
- cosmic rays;
- galaxies: individual: NGC 253;
- galaxies: magnetic fields;
- galaxies: starburst;
- Astrophysics - Astrophysics of Galaxies;
- Astrophysics - High Energy Astrophysical Phenomena
- E-Print:
- 5 pages, 2 figures