Detecting extended gamma-ray emission with the next generation Cherenkov telescopes

Very high energy (VHE >100 GeV) gamma rays coming from blazars can produce pairs when interacting with the Extragalactic Background Light (EBL) and the Cosmic Microwave Background, generating an electromagnetic cascade. Depending on the Intergalactic Magnetic Field (IGMF) intensity, this cascade...

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Publicado: 2015
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_18248039_v30-July-2015_n_p_Alonso
http://hdl.handle.net/20.500.12110/paper_18248039_v30-July-2015_n_p_Alonso
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_18248039_v30-July-2015_n_p_Alonso
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spelling paper:paper_18248039_v30-July-2015_n_p_Alonso2023-06-08T16:29:17Z Detecting extended gamma-ray emission with the next generation Cherenkov telescopes Very high energy (VHE >100 GeV) gamma rays coming from blazars can produce pairs when interacting with the Extragalactic Background Light (EBL) and the Cosmic Microwave Background, generating an electromagnetic cascade. Depending on the Intergalactic Magnetic Field (IGMF) intensity, this cascade may result in an extended isotropic emission of photons around the source (halo), or in a broadening of the emission beam. The detection of these effects might lead to important constrains both on the IGMF intensity and the EBL density, quantities of great relevance in cosmological models. Using a Monte Carlo program, we simulate electromagnetic cascades for different values of the IGMF intensities and coming from a source similar to 1ES0229+200, a blazar with hard intrinsic spectrum at redshift z = 0:14, which is an ideal distance for potentially observing the effect. We study the possible response of a generic future Cherenkov telescope using a simplified model for the sensitivity, effective area and angular resolution. Finally, combining these instrument properties, we calculate the angular distribution of photons and develop a method to test the statistical feasibility of detecting the effect in the near future. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_18248039_v30-July-2015_n_p_Alonso http://hdl.handle.net/20.500.12110/paper_18248039_v30-July-2015_n_p_Alonso
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description Very high energy (VHE >100 GeV) gamma rays coming from blazars can produce pairs when interacting with the Extragalactic Background Light (EBL) and the Cosmic Microwave Background, generating an electromagnetic cascade. Depending on the Intergalactic Magnetic Field (IGMF) intensity, this cascade may result in an extended isotropic emission of photons around the source (halo), or in a broadening of the emission beam. The detection of these effects might lead to important constrains both on the IGMF intensity and the EBL density, quantities of great relevance in cosmological models. Using a Monte Carlo program, we simulate electromagnetic cascades for different values of the IGMF intensities and coming from a source similar to 1ES0229+200, a blazar with hard intrinsic spectrum at redshift z = 0:14, which is an ideal distance for potentially observing the effect. We study the possible response of a generic future Cherenkov telescope using a simplified model for the sensitivity, effective area and angular resolution. Finally, combining these instrument properties, we calculate the angular distribution of photons and develop a method to test the statistical feasibility of detecting the effect in the near future.
title Detecting extended gamma-ray emission with the next generation Cherenkov telescopes
spellingShingle Detecting extended gamma-ray emission with the next generation Cherenkov telescopes
title_short Detecting extended gamma-ray emission with the next generation Cherenkov telescopes
title_full Detecting extended gamma-ray emission with the next generation Cherenkov telescopes
title_fullStr Detecting extended gamma-ray emission with the next generation Cherenkov telescopes
title_full_unstemmed Detecting extended gamma-ray emission with the next generation Cherenkov telescopes
title_sort detecting extended gamma-ray emission with the next generation cherenkov telescopes
publishDate 2015
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_18248039_v30-July-2015_n_p_Alonso
http://hdl.handle.net/20.500.12110/paper_18248039_v30-July-2015_n_p_Alonso
_version_ 1768545437755637760

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