| dc.contributor.author |
GUPTA, N |
en_US |
| dc.date.accessioned |
2011-08-03T18:36:33Z |
en_US |
| dc.date.accessioned |
2011-12-26T12:54:20Z |
en_US |
| dc.date.accessioned |
2011-12-27T05:42:03Z |
|
| dc.date.available |
2011-08-03T18:36:33Z |
en_US |
| dc.date.available |
2011-12-26T12:54:20Z |
en_US |
| dc.date.available |
2011-12-27T05:42:03Z |
|
| dc.date.issued |
2008 |
en_US |
| dc.identifier.citation |
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, (6), - |
en_US |
| dc.identifier.issn |
1475-7516 |
en_US |
| dc.identifier.uri |
http://dx.doi.org/10.1088/1475-7516/2008/06/022 |
en_US |
| dc.identifier.uri |
http://dspace.library.iitb.ac.in/xmlui/handle/10054/9116 |
en_US |
| dc.identifier.uri |
http://hdl.handle.net/10054/9116 |
|
| dc.description.abstract |
Centaurus A, the cosmic ray accelerator a few Mpc away from us, is possibly one of the nearest sources of extremely high energy cosmic rays. We investigate whether the gamma ray data currently available from Centaurus A in the GeV-TeV energy band can be explained with only proton-proton interactions. We show that for a single power law proton spectrum, mechanisms of gamma-ray production other than proton-proton interactions are needed inside this radio-galaxy to explain the gamma ray flux observed by EGRET, upper limits from HESS/CANGAROO-III and the correlated extremely energetic cosmic ray events observed by the Pierre Auger experiment. In future, with better gamma-ray data, and simultaneous observation with gamma-ray and cosmic ray detectors, it will be possible to carry out such studies on different sources in more detail. |
en_US |
| dc.language.iso |
en |
en_US |
| dc.publisher |
IOP PUBLISHING LTD |
en_US |
| dc.subject |
cosmic-rays |
en_US |
| dc.subject |
emission |
en_US |
| dc.subject.other |
ultra high energy cosmic rays |
en_US |
| dc.subject.other |
ultra high energy photons and neutrinos |
en_US |
| dc.title |
Gamma rays from Centaurus A |
en_US |
| dc.type |
Article |
en_US |