Repository of University of Nova Gorica

Show document
A+ | A- | Help | SLO | ENG

Title:Search for EeV protons of galactic origin
Authors:ID Abbasi, R.U. (Author)
ID Lundquist, Jon Paul, UNG (Author), et al.
Files: This document has no files that are freely available to the public. This document may have a physical copy in the library of the organization, check the status via COBISS. Link is opened in a new window
Language:English
Work type:Not categorized
Typology:1.01 - Original Scientific Article
Organization:UNG - University of Nova Gorica
Abstract:Cosmic rays in the energy range 10^18.0–10^18.5 eV are thought to have a light, probably protonic, composition. To study their origin one can search for anisotropy in their arrival directions. Extragalactic cosmic rays should be isotropic, but galactic cosmic rays of this type should be seen mostly along the galactic plane, and there should be a shortage of events coming from directions near the galactic anticenter. This is due to the fact that, under the influence of the galactic magnetic field, the transition from ballistic to diffusive behavior is well advanced, and this qualitative picture persists over the whole energy range. Guided by models of the galactic magnetic field that indicate that the enhancement along the galactic plane should have a standard deviation of about 20° in galactic latitude, and the deficit in the galactic anticenter direction should have a standard deviation of about 50° in galactic longitude, we use the data of the Telescope Array surface detector in 10^18.0 to 10^18.5 eV energy range to search for these effects. The data are isotropic. Neither an enhancement along the galactic plane nor a deficit in the galactic anticenter direction is found. Using these data we place an upper limit on the fraction of EeV cosmic rays of galactic origin at 1.3% at 95% confidence level.
Keywords:Cosmic ray, Galactic protons, Telescope array, Surface detector
Publication version:Version of Record
Year of publishing:2016
Number of pages:15
Numbering:86, 86
PID:20.500.12556/RUNG-5193-b73aecaf-85aa-2a23-8cbf-4afb68b08d1e New window
COBISS.SI-ID:13261571 New window
DOI:10.1016/j.astropartphys.2016.11.001 New window
NUK URN:URN:SI:UNG:REP:UYW5PMJB
Publication date in RUNG:30.04.2020
Views:3890
Downloads:0
Metadata:XML DC-XML DC-RDF
:
ABBASI, R.U. and LUNDQUIST, Jon Paul, 2016, Search for EeV protons of galactic origin. Astroparticle Physics [online]. 2016. Vol. 86, no. 86. [Accessed 4 April 2025]. DOI 10.1016/j.astropartphys.2016.11.001. Retrieved from: https://repozitorij.ung.si/IzpisGradiva.php?lang=eng&id=5193
Copy citation
  
Average score:
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
(0 votes)
Your score:Voting is allowed only for logged in users.
Share:Bookmark and Share


Hover the mouse pointer over a document title to show the abstract or click on the title to get all document metadata.

Record is a part of a journal

Title:Astroparticle Physics
Year of publishing:2016

Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:29.04.2020

Back