Lensing of ultra-high energy cosmic rays in turbulent magnetic fields

We consider the propagation of ultra high energy cosmic rays through turbulent magnetic fields and study the transition between the regimes of single and multiple images of point-like sources. The transition occurs at energies around Ec ≃ Z 41EeV(Brms/5 μG) (L/2 kpc) 3/2 √50pc/Lc, where L is the dis...

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Detalles Bibliográficos
Autores principales:	Harari, Diego Darío, Roulet, Esteban, Sanchez, Federico A.
Publicado:	2002
Materias:	Electromagnetic Processes and Properties High Energy Cosmic Rays
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10298479_v6_n3_p1085_Harari http://hdl.handle.net/20.500.12110/paper_10298479_v6_n3_p1085_Harari
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_10298479_v6_n3_p1085_Harari
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spelling	paper:paper_10298479_v6_n3_p1085_Harari2023-06-08T16:00:28Z Lensing of ultra-high energy cosmic rays in turbulent magnetic fields Harari, Diego Darío Roulet, Esteban Sanchez, Federico A. Electromagnetic Processes and Properties High Energy Cosmic Rays We consider the propagation of ultra high energy cosmic rays through turbulent magnetic fields and study the transition between the regimes of single and multiple images of point-like sources. The transition occurs at energies around Ec ≃ Z 41EeV(Brms/5 μG) (L/2 kpc) 3/2 √50pc/Lc, where L is the distance traversed by the CR's with electric charge Ze in the turbulent magnetic field of root mean square strength Brms and coherence length Lc. We find that above 2EC only sources located in a fraction of a few % of the sky can reach large amplifications of its principal image or start developing multiple images. New images appear in pairs with huge magnifications, and they remain amplified over a significant range of energies. At decreasing energies the fraction of the sky in which sources can develop multiple images increases, reaching about 50% for E > Ec/2. The magnification peaks become however increasingly narrower and for E < Ec/3 their integrated effect becomes less noticeable. If a uniform magnetic field component is also present it would further narrow down the peaks, shrinking the energy range in which they can be relevant. Below E ≃ EC/10 some kind of scintillation regime is reached, where many demagnified images of a source are present but with overall total magnification of order unity. We also search for lensing signatures in the AGASA data studying two-dimensional correlations in angle and energy and find some interesting hints. © SISSA/ISAS 2002. Fil:Harari, D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Roulet, E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Sánchez, F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2002 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10298479_v6_n3_p1085_Harari http://hdl.handle.net/20.500.12110/paper_10298479_v6_n3_p1085_Harari
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Electromagnetic Processes and Properties High Energy Cosmic Rays
spellingShingle	Electromagnetic Processes and Properties High Energy Cosmic Rays Harari, Diego Darío Roulet, Esteban Sanchez, Federico A. Lensing of ultra-high energy cosmic rays in turbulent magnetic fields
topic_facet	Electromagnetic Processes and Properties High Energy Cosmic Rays
description	We consider the propagation of ultra high energy cosmic rays through turbulent magnetic fields and study the transition between the regimes of single and multiple images of point-like sources. The transition occurs at energies around Ec ≃ Z 41EeV(Brms/5 μG) (L/2 kpc) 3/2 √50pc/Lc, where L is the distance traversed by the CR's with electric charge Ze in the turbulent magnetic field of root mean square strength Brms and coherence length Lc. We find that above 2EC only sources located in a fraction of a few % of the sky can reach large amplifications of its principal image or start developing multiple images. New images appear in pairs with huge magnifications, and they remain amplified over a significant range of energies. At decreasing energies the fraction of the sky in which sources can develop multiple images increases, reaching about 50% for E > Ec/2. The magnification peaks become however increasingly narrower and for E < Ec/3 their integrated effect becomes less noticeable. If a uniform magnetic field component is also present it would further narrow down the peaks, shrinking the energy range in which they can be relevant. Below E ≃ EC/10 some kind of scintillation regime is reached, where many demagnified images of a source are present but with overall total magnification of order unity. We also search for lensing signatures in the AGASA data studying two-dimensional correlations in angle and energy and find some interesting hints. © SISSA/ISAS 2002.
author	Harari, Diego Darío Roulet, Esteban Sanchez, Federico A.
author_facet	Harari, Diego Darío Roulet, Esteban Sanchez, Federico A.
author_sort	Harari, Diego Darío
title	Lensing of ultra-high energy cosmic rays in turbulent magnetic fields
title_short	Lensing of ultra-high energy cosmic rays in turbulent magnetic fields
title_full	Lensing of ultra-high energy cosmic rays in turbulent magnetic fields
title_fullStr	Lensing of ultra-high energy cosmic rays in turbulent magnetic fields
title_full_unstemmed	Lensing of ultra-high energy cosmic rays in turbulent magnetic fields
title_sort	lensing of ultra-high energy cosmic rays in turbulent magnetic fields
publishDate	2002
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10298479_v6_n3_p1085_Harari http://hdl.handle.net/20.500.12110/paper_10298479_v6_n3_p1085_Harari
work_keys_str_mv	AT hararidiegodario lensingofultrahighenergycosmicraysinturbulentmagneticfields AT rouletesteban lensingofultrahighenergycosmicraysinturbulentmagneticfields AT sanchezfedericoa lensingofultrahighenergycosmicraysinturbulentmagneticfields
_version_	1768543144302870528

Lensing of ultra-high energy cosmic rays in turbulent magnetic fields

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