Mankuzhiyil, N. and Persic, M. and Tavecchio, F. (2011) Spectral candles to measure the Extragalactic Background Light. Il nuovo cimento C, 34 (3). pp. 247-251. ISSN 1826-9885
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Abstract
Extragalactic Background Light (EBL) is the integrated light from all stars that have ever formed, and spans in a range of Infrared (IR) to Ultraviolet (UV). The interaction of very-high-energy (VHE: E > 100 GeV) γ-rays emitted by Active Galactic Nuclei (AGN) at cosmological distances with the EBL results in electron-positron pair production that leads to an energy-dependent attenuation of the observed VHE flux. Here we introduce a method based on the attenuation to measure the EBL photon number density. We then apply this method on simultaneous blazar data—PKS 2155-304—to determine the optical density at z = 0.12 and compare it with the optical densities predicted by popular EBL models.
| Item Type: | Article |
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| Uncontrolled Keywords: | Background radiations ; Active and peculiar galaxies and related systems (including BL Lacertae objects, blazars, Seyfert galaxies, Markarian galaxies, and active galactic nuclei) |
| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 06 Apr 2020 18:45 |
| Last Modified: | 06 Apr 2020 18:45 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/17278 |
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