Gamma rays from Centaurus A

被引：10
|
作者：
Gupta, Nayantara [1 ]
机构：
[1] Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India
来源：
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2008年 / 06期
关键词：
ultra high energy cosmic rays; ultra high energy photons and neutrinos;
D O I：
10.1088/1475-7516/2008/06/022
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
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.
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页数：7
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