Extragalactic Cosmic Rays

Brecher, K.; Burbidge, G. R.

doi:10.1086/151488

Cited by 88 publications

(36 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, in order to make a direct comparison with EGRET or any other experiment, the predicted γ-ray intensity has to be compared with the corresponding point-spread function. Although the predicted intensity based on the dynamic balance is in good agreement with the EGRET result, it is also in agreement with the cosmic ray density being the same throughout the galaxy, as if, for instance, the cosmic ray density is universal in origin (e.g., Brecher and Burbidge 1972) The LMC EGRET detection did not allowed to distinguish between these two possibilities, although an ever increasing amount of evidence favored the Galactic hypothesis. It was the non-detection of the Small Magellanic Cloud (SMC) what would settle this issue.…”

Section: Normal Galaxiessupporting

confidence: 68%

Extragalactic Gamma-Ray Sources

Torres

2004

Cosmic Gamma-Ray Sources

View full text Add to dashboard Cite

This chapter provides a review of γ-ray sources lying at high Galactic latitudes. Their statistical properties and variability status, as well as studies involving cross correlations with lower frequency catalogs and multiwavelength observations, are summarized. The case for active galactic nuclei is analyzed with special emphasis, since they represent the largest population of high energy sources known to date. Other potential γ-ray emitters (including nearby starburst galaxies, normal galaxies, molecular clouds in the Galactic halo, galaxy clusters, and radio galaxies) that may appear in the next generation of γ-ray catalogs and, perhaps, that might have been already observed by EGRET as unidentified detections, are also discussed.

show abstract

Section: Normal Galaxiessupporting

confidence: 68%

Extragalactic Gamma-Ray Sources

Torres

2004

Cosmic Gamma-Ray Sources

View full text Add to dashboard Cite

show abstract

“…It is not even clear whether the important sources of cosmic rays are inside or outside the galaxy, and conflicting views are held by a number of authors such as: Ginzburg and Syrovatskii (1964) (galactic origin) and Brecher and Burbidge (1972) (extragalactic origin).…”

Section: Introductionmentioning

confidence: 99%

The gamma-ray background: a consequence of metagalactic cosmic ray origin?

Strong¹,

Wdowczyk²,

Wolfendale³

1974

J. Phys. A: Math. Nucl. Gen.

View full text Add to dashboard Cite

Abstract. An estimate is made of the y-ray spectrum resulting from an extragalactic, evolving source model of cosmic ray origin in the absence of intergalactic gas. The experimental situation does not at present appear to allow definite rejection of this theory, since the calculated spectrum lies between the extreme observational limits. It is possible that such a theory can explain the cosmic ray spectrum, the isotropy of cosmic rays and the diffuse y-ray spectrum.

show abstract

“…The question of the origin of ultrahigh energy cosmicrays evidenced by massive air-showers is still a matter of controversy. The older view of an extragalactic origin has recently been summarized by Brecher and Burbidge (1972).…”

mentioning

confidence: 99%