Galactic Cosmic Ray increase associated with an interplanetary magnetic cloud observed by HAWC

the HAWC Collaboration

Producción científica

Resumen

We present the observation of an anomalous increment of the galactic cosmic ray (GCR) flux observed by the HAWC array during October 2016. We propose that this anisotropy of the GCR flux was caused by a magnetic flux rope (MFR) i. e., by the helicoidal magnetic field of an interplanetary coronal mass ejection observed at 1 AU at the same time. We computed the trajectory of protons with energy in the range of 10 to 60 GeV, traveling inside the helicoidal magnetic field observed in situ. The direction of these particles changes towards the axis of the MFR resulting in an anisotropy of the GCR flux along this axis. This model shows that the alignment between the MFR axis and the HAWC's asymptotic direction, combined with the high sensitivity of HAWC, allowed us to observe the effect of the passage of the MFR on the GCR flux. We present the HAWC observation associated with the passage of the MFR as well as the heliospheric circumstances around such phenomenon.

Idioma originalEnglish
Título de la publicación alojadaGalactic Cosmic Ray increase associated with an interplanetary magnetic cloud observed by HAWC
Volumen395
EstadoPublished - 18 mar 2022
Evento37th International Cosmic Ray Conference, ICRC 2021 - Virtual, Berlin
Duración: 12 jul 202123 jul 2021

Serie de la publicación

NombreProceedings of Science
EditorialSissa Medialab Srl

Conference

Conference37th International Cosmic Ray Conference, ICRC 2021
País/TerritorioGermany
CiudadVirtual, Berlin
Período12/7/2123/7/21

Nota bibliográfica

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All Science Journal Classification (ASJC) codes

  • General

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