English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
 
 
DownloadE-Mail
  Acceleration of cosmic rays and gamma-ray emission from supernova remnants in the Galaxy

Cristofari, P., Gabici, S., Casanova, S., Terrier, R., & Parizot, E. (2013). Acceleration of cosmic rays and gamma-ray emission from supernova remnants in the Galaxy. Monthly Notices of the Royal Astronomical Society, 434(4), 2748-2760. doi:10.1093/mnras/stt1096.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0014-6CCA-1 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0014-6CCB-0
Genre: Journal Article

Files

show Files
hide Files
:
1302.2150.pdf (Preprint), 361KB
Name:
1302.2150.pdf
Description:
File downloaded from arXiv at 2013-10-17 11:06
Visibility:
Public
MIME-Type / Checksum:
application/pdf / [MD5]
Technical Metadata:
Copyright Date:
-
Copyright Info:
-

Locators

show

Creators

show
hide
 Creators:
Cristofari, P., Author
Gabici, S., Author
Casanova, Sabrina1, Author              
Terrier, R., Author
Parizot, E., Author
Affiliations:
1Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society, ou_904550              

Content

show
hide
Free keywords: Astrophysics, High Energy Astrophysical Phenomena, astro-ph.HE
 Abstract: Galactic cosmic rays are believed to be accelerated at supernova remnant shocks. Though very popular and robust, this conjecture still needs a conclusive proof. The strongest support to this idea is probably the fact that supernova remnants are observed in gamma-rays, which are indeed expected as the result of the hadronic interactions between the cosmic rays accelerated at the shock and the ambient gas. However, also leptonic processes can, in most cases, explain the observed gamma-ray emission. This implies that the detections in gamma rays do not necessarily mean that supernova remnants accelerate cosmic ray protons. To overcome this degeneracy, the multi-wavelength emission (from radio to gamma rays) from individual supernova remnants has been studied and in a few cases it has been possible to ascribe the gamma-ray emission to one of the two processes (hadronic or leptonic). Here we adopt a different approach and, instead of a case-by-case study we aim for a population study and we compute the number of supernova remnants which are expected to be seen in TeV gamma rays above a given flux under the assumption that these objects indeed are the sources of cosmic rays. The predictions found here match well with current observational results, thus providing a novel consistency check for the supernova remnant paradigm for the origin of galactic cosmic rays. Moreover, hints are presented for the fact that particle spectra significantly steeper than E^-2 are produced at supernova remnants. Finally, we expect that several of the supernova remnants detected by H.E.S.S. in the survey of the galactic plane should exhibit a gamma-ray emission dominated by hadronic processes (i.e. neutral pion decay). The fraction of the detected remnants for which the leptonic emission dominates over the hadronic one depends on the assumed values of the physical parameters and can be as high as roughly a half.

Details

show
hide
Language(s):
 Dates: 2013-08-08
 Publication Status: Published online
 Pages: 14 pages, 4 figures, 4 tables, submitted to MNRAS
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: arXiv: 1302.2150
DOI: 10.1093/mnras/stt1096
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Monthly Notices of the Royal Astronomical Society
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Oxford : Blackwell Science
Pages: - Volume / Issue: 434 (4) Sequence Number: - Start / End Page: 2748 - 2760 Identifier: ISSN: 1365-8711
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000024150
DOI: 10.1093/mnras/stt1096