Is the galatic cosmic-ray spectrum constant in time?
- The hypothesis is considered that the present, local Galactic cosmic-ray spectrum is, due to source intermittency, softer than average over time and over the Galaxy. Measurements of muogenic nuclides underground could provide an independent measurement of the time-averaged spectrum. Source intermittency could also account for the surprising low anisotropy reported by the IceCube Collaboration. Predictions for Galactic emission of ultrahigh-energy (UHE) quanta, such as UHE gamma rays and neutrinos, might be higher or lower than previously estimated.
| Author details: | David Eichler, Rahul Kumar, Martin PohlORCiDGND |
|---|---|
| DOI: | https://doi.org/10.1088/0004-637X/769/2/138 |
| ISSN: | 0004-637X |
| Title of parent work (English): | The astrophysical journal : an international review of spectroscopy and astronomical physics |
| Publisher: | IOP Publ. Ltd. |
| Place of publishing: | Bristol |
| Publication type: | Article |
| Language: | English |
| Year of first publication: | 2013 |
| Publication year: | 2013 |
| Release date: | 2017/03/26 |
| Tag: | cosmic rays |
| Volume: | 769 |
| Issue: | 2 |
| Number of pages: | 4 |
| Funding institution: | Initiative and Networking Fund of the Helmholtz Association; Helmholtz Alliance for Astroparticle Physics, HAP; United States-Israel Binational Science Foundation; Israel Science Foundation; Joan and Robert Arnow Chair of Theoretical Astrophysics |
| Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
| Peer review: | Referiert |
