Abstract

Discovery of two giant structures seen in gamma-rays and radio, located above and below the Galactic center, known as Fermi bubbles, can be considered as one of the most interesting phenomena observed by Fermi-LAT. Their position and total energy content suggest a very strong energy outburst happened in the Galactic center in the past. We point out some limitations of theoretical models of Fermi bubbles. We also discuss interconnection between Fermi bubbles and Galactic cosmic rays. In particular, we point out that gamma-ray emitting electrons in the bubbles are most likely originated from cosmic ray electrons. In addition we show that Fermi bubbles may be responsible for the formation of the spectrum of cosmic rays above the “knee”.

Details

Title
Fermi bubbles, their origin and possible connection to cosmic rays near the Earth
Author
Chernyshov, D 1 ; Cheng, K S 2 ; Dogiel, V 1 ; Ko, C M 3 

 I.E.Tamm Theoretical Physics Division of P.N.Lebedev Institute of Physics, Leninskii pr. 53, 119991 Moscow, Russia 
 Department of Physics, University of Hong Kong, Pokfulam Road, Hong Kong, China 
 Institute of Astronomy, Department of Physics and Center for Complex Systems, National Central University, Jhongli District, Taoyuan City, Taiwan 320, R.O.C. 
Publication year
2019
Publication date
Feb 2019
Publisher
IOP Publishing
ISSN
17426588
e-ISSN
17426596
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2566048783
Copyright
© 2019. This work is published under http://creativecommons.org/licenses/by/3.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.