| HAL : hal-00713420, version 1 |
| arXiv : 1103.3484 |
| Code Bibliographique ADS : 2012ApJ...757...61N |
| DOI : 10.1088/0004-637X/757/1/61 |
| Fiche détaillée | Récupérer au format |
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| Astrophysical Journal 757 (2012) 61 |
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| Extragalactic Very High Energy Gamma-Ray Background |
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| A. Neronov 1D.V. Semikoz 2 |
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| (09/2012) |
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| We study the origin of the extragalactic diffuse gamma-ray background using the data from the Fermi telescope. To estimate the background level, we count photons at high Galactic latitudes |b| > 60°. Subtracting photons associated with known sources and the residual cosmic-ray and Galactic diffuse backgrounds, we estimate the extragalactic gamma-ray background (EGB) flux. We find that the spectrum of EGB in the very high energy band above 30 GeV follows the stacked spectrum of BL Lac objects. Large Area Telescope data reveal the positive (1 + z) k , 1 < k < 4 cosmological evolution of the BL Lac source population consistent with that of their parent population, Fanaroff-Riley type I radio galaxies. We show that EGB at E > 30 GeV could be completely explained by emission from unresolved BL Lac objects if k ~= 3. |
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| 1 : | INTEGRAL Science Data Center (ISDC) |
| Geneva Observatory | |
| 2 : | AstroParticule et Cosmologie (APC) |
| CNRS : UMR7164 – IN2P3 – Observatoire de Paris – Université Paris VII - Paris Diderot – CEA : DSM/IRFU | |
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| APC - THEORIE |
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| Domaine | : | Physique/Astrophysique/Phénomènes cosmiques de haute energie Planète et Univers/Astrophysique/Phénomènes cosmiques de haute energie |
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| BL Lacertae objects: general – gamma rays: diffuse background |
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| Lien vers le texte intégral : |
| hal-00713420, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00713420 | |
| oai:hal.archives-ouvertes.fr:hal-00713420 | |
| Contributeur : Dmitri Semikoz | |
| Soumis le : Dimanche 1 Juillet 2012, 08:52:59 | |
| Dernière modification le : Mercredi 12 Septembre 2012, 00:22:04 | |