Preliminary indirect measurement of cosmic-ray proton spectrum using Earth's γ-ray data from fermi large area telescope

Preliminary indirect measurement of cosmic-ray proton spectrum using Earth's γ-ray data from fermi large area telescope

Cosmic rays (CRs) are high-energy particles, mostly protons, propagating in space. The rigidity (momentum per charge) spectrum of CRs is well described by a power law for which the spectral index is approximately 2.8 around 30 - 1000 GV. Recent measurements by PAMELA and AMS-02 indicate an abrupt ch...

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Main Author: Patomporn Payoungkhamdee
Other Authors: Mahidol University
Format: Conference or Workshop Item
Published: 2022
Subjects:
Physics and Astronomy
Online Access:https://repository.li.mahidol.ac.th/handle/123456789/79018
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spelling th-mahidol.790182022-08-04T18:28:19Z Preliminary indirect measurement of cosmic-ray proton spectrum using Earth's γ-ray data from fermi large area telescope Patomporn Payoungkhamdee Mahidol University Physics and Astronomy Cosmic rays (CRs) are high-energy particles, mostly protons, propagating in space. The rigidity (momentum per charge) spectrum of CRs is well described by a power law for which the spectral index is approximately 2.8 around 30 - 1000 GV. Recent measurements by PAMELA and AMS-02 indicate an abrupt change of the CR proton spectral index at about 340 GV. When CRs interact with the Earth's upper atmosphere, γ rays can be produced and detected by space-based detectors. Here we use the Earth's γ-ray data collected by the Fermi Large Area Telescope along with a proton-air interaction model to indirectly determine the CR proton spectral index and compare against observations by other instruments. 2022-08-04T11:28:19Z 2022-08-04T11:28:19Z 2021-01-28 Conference Paper Journal of Physics: Conference Series. Vol.1719, No.1 (2021) 10.1088/1742-6596/1719/1/012016 17426596 17426588 2-s2.0-85100777218 https://repository.li.mahidol.ac.th/handle/123456789/79018 Mahidol University SCOPUS https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85100777218&origin=inward
institution Mahidol University
building Mahidol University Library
continent Asia
country Thailand
Thailand
content_provider Mahidol University Library
collection Mahidol University Institutional Repository
topic Physics and Astronomy
spellingShingle Physics and Astronomy
Patomporn Payoungkhamdee
Preliminary indirect measurement of cosmic-ray proton spectrum using Earth's γ-ray data from fermi large area telescope
description Cosmic rays (CRs) are high-energy particles, mostly protons, propagating in space. The rigidity (momentum per charge) spectrum of CRs is well described by a power law for which the spectral index is approximately 2.8 around 30 - 1000 GV. Recent measurements by PAMELA and AMS-02 indicate an abrupt change of the CR proton spectral index at about 340 GV. When CRs interact with the Earth's upper atmosphere, γ rays can be produced and detected by space-based detectors. Here we use the Earth's γ-ray data collected by the Fermi Large Area Telescope along with a proton-air interaction model to indirectly determine the CR proton spectral index and compare against observations by other instruments.
author2 Mahidol University
author_facet Mahidol University
Patomporn Payoungkhamdee
format Conference or Workshop Item
author Patomporn Payoungkhamdee
author_sort Patomporn Payoungkhamdee
title Preliminary indirect measurement of cosmic-ray proton spectrum using Earth's γ-ray data from fermi large area telescope
title_short Preliminary indirect measurement of cosmic-ray proton spectrum using Earth's γ-ray data from fermi large area telescope
title_full Preliminary indirect measurement of cosmic-ray proton spectrum using Earth's γ-ray data from fermi large area telescope
title_fullStr Preliminary indirect measurement of cosmic-ray proton spectrum using Earth's γ-ray data from fermi large area telescope
title_full_unstemmed Preliminary indirect measurement of cosmic-ray proton spectrum using Earth's γ-ray data from fermi large area telescope
title_sort preliminary indirect measurement of cosmic-ray proton spectrum using earth's γ-ray data from fermi large area telescope
publishDate 2022
url https://repository.li.mahidol.ac.th/handle/123456789/79018
_version_ 1763490437943787520

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