Please use this identifier to cite or link to this item:
http://hdl.handle.net/2289/6163
Title: | Photo-disintegration of heavy nuclei at the core of Cen A |
Authors: | Kundu, Esha Gupta, Nayantara |
Keywords: | Gamma ray thoery cosmic ray theory active galactic nuclei SCOAP3 |
Issue Date: | Apr-2014 |
Publisher: | IOP Publishing for SISSA |
Citation: | Journal of Cosmology and Astroparticle Physics, 2014, Vol.4, p04 |
Abstract: | Fermi LAT has detected gamma ray emissions from the core of Cen A. More recently, a new component in the gamma ray spectrum from the core has been reported in the energy range of 4 GeV to tens of GeV. We show that the new component and the HESS detected spectrum of gamma rays from the core at higher energy have possibly a common origin in photo-disintegration of heavy nuclei. Assuming the cosmic rays are mostly Fe nuclei inside the core and their spectrum has a low energy cut-off at 52 TeV in the wind frame moving with a Doppler factor 0.25 with respect to the observer on earth, the cosmic ray luminosity required to explain the observed gamma ray flux above 1 GeV is found to be 1.5 × 1043 erg/sec. |
Description: | Open Access |
URI: | http://hdl.handle.net/2289/6163 |
ISSN: | 1475-7516 |
Alternative Location: | http://adsabs.harvard.edu/abs/2014JCAP...04..030K http://arxiv.org/abs/1312.7440 http://dx.doi.org/10.1088/1475-7516/2014/04/030 |
Copyright: | IOP Publishing and SISSA |
Appears in Collections: | Research Papers (A&A) |
Files in This Item:
File | Description | Size | Format | |
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2014_JoCosAP_4_30.pdf | Open Access | 1.14 MB | Adobe PDF | View/Open |
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