Azimuthal modulation of the event rate of cosmic ray extensive air showers by the geomagnetic field

The Earth's magnetic field effect on the azimuthal distribution of extensive air showers (EAS) of cosmic rays has been evaluated using a bulk of the Yakutsk array data. The uniform azimuthal distribution of the EAS event rate is rejected at the significance level 10^(-14). Amplitude of the firs...

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Main Authors: Ivanov, A A, Egorova, V P, Kolosov, V A, Krasilnikov, A D, Pravdin, M I, Sleptsov, I Ye
Language:English
Published: 1999
Subjects:
Astrophysics and Astronomy
Yakutsk
Online Access:http://cds.cern.ch/record/382691
id ftcern:oai:cds.cern.ch:382691
record_format openpolar
spelling ftcern:oai:cds.cern.ch:382691 2023-05-15T18:45:25+02:00 Azimuthal modulation of the event rate of cosmic ray extensive air showers by the geomagnetic field Ivanov, A A Egorova, V P Kolosov, V A Krasilnikov, A D Pravdin, M I Sleptsov, I Ye 1999 http://cds.cern.ch/record/382691 eng eng http://cds.cern.ch/record/382691 astro-ph/9903337 oai:cds.cern.ch:382691 Astrophysics and Astronomy 1999 ftcern 2018-07-28T03:57:40Z The Earth's magnetic field effect on the azimuthal distribution of extensive air showers (EAS) of cosmic rays has been evaluated using a bulk of the Yakutsk array data. The uniform azimuthal distribution of the EAS event rate is rejected at the significance level 10^(-14). Amplitude of the first harmonics of observed distribution depends on zenith angle as A1=0.2*sin^2(theta) and is almost independent of the primary energy; the phase coincides with the magnetic meridian. Basing upon the value of measured effect, the correction factor has been derived for the particle density depending on a geomagnetic parameter of a shower. Other/Unknown Material Yakutsk CERN Document Server (CDS) Yakutsk
institution Open Polar
collection CERN Document Server (CDS)
op_collection_id ftcern
language English
topic Astrophysics and Astronomy
spellingShingle Astrophysics and Astronomy
Ivanov, A A
Egorova, V P
Kolosov, V A
Krasilnikov, A D
Pravdin, M I
Sleptsov, I Ye
Azimuthal modulation of the event rate of cosmic ray extensive air showers by the geomagnetic field
topic_facet Astrophysics and Astronomy
description The Earth's magnetic field effect on the azimuthal distribution of extensive air showers (EAS) of cosmic rays has been evaluated using a bulk of the Yakutsk array data. The uniform azimuthal distribution of the EAS event rate is rejected at the significance level 10^(-14). Amplitude of the first harmonics of observed distribution depends on zenith angle as A1=0.2*sin^2(theta) and is almost independent of the primary energy; the phase coincides with the magnetic meridian. Basing upon the value of measured effect, the correction factor has been derived for the particle density depending on a geomagnetic parameter of a shower.
author Ivanov, A A
Egorova, V P
Kolosov, V A
Krasilnikov, A D
Pravdin, M I
Sleptsov, I Ye
author_facet Ivanov, A A
Egorova, V P
Kolosov, V A
Krasilnikov, A D
Pravdin, M I
Sleptsov, I Ye
author_sort Ivanov, A A
title Azimuthal modulation of the event rate of cosmic ray extensive air showers by the geomagnetic field
title_short Azimuthal modulation of the event rate of cosmic ray extensive air showers by the geomagnetic field
title_full Azimuthal modulation of the event rate of cosmic ray extensive air showers by the geomagnetic field
title_fullStr Azimuthal modulation of the event rate of cosmic ray extensive air showers by the geomagnetic field
title_full_unstemmed Azimuthal modulation of the event rate of cosmic ray extensive air showers by the geomagnetic field
title_sort azimuthal modulation of the event rate of cosmic ray extensive air showers by the geomagnetic field
publishDate 1999
url http://cds.cern.ch/record/382691
geographic Yakutsk
geographic_facet Yakutsk
genre Yakutsk
genre_facet Yakutsk
op_relation http://cds.cern.ch/record/382691
astro-ph/9903337
oai:cds.cern.ch:382691
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