An upper limit on the cosmic-ray luminosity of individual sources from gamma-ray observations

被引：21

作者：

Supanitsky, A. D. ^{[1
]}

de Souza, V. ^{[2
]}

机构：

[1] CONICET UBA, Inst Astron & Fis Espacio, Buenos Aires, DF, Argentina

[2] Univ Sao Paulo, Inst Fis Sao Carlos, BR-05508 Sao Paulo, Brazil

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2013年 / 12期

基金：

巴西圣保罗研究基金会;

关键词：

ultra high energy cosmic rays; gamma ray experiments; gamma ray theory; RADIO GALAXY PICTOR; NUCLEI;

D O I：

10.1088/1475-7516/2013/12/023

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Different types of extragalactic objects are known to produce TeV gamma-rays. Some of these objects are the most probable candidates to accelerate cosmic rays up to 10(20) eV. It is very well known that gamma-rays can be produced as a result of the cosmic ray propagation through the intergalactic medium. These gamma-rays contribute to the total flux observed in the direction of the source. In this paper we propose a new method to derive an upper limit on the cosmic-ray luminosity of an individual source based on the measured upper limit on the integral flux of GeV-TeV gamma-rays. We show how it is possible to calculate an upper limit on the cosmic-ray luminosity of a particular source and we explore the parameter space in which the current GeV-TeV gamma-ray measurements can off er a useful determination. We study in detail two particular sources, Pictor A and NGC 7469, and we calculate the upper limit on the proton luminosity of each source based on the upper limit on the integral gamma-ray flux measured by the H. E. S. S. telescopes.

引用

页数：16

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