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January 22, 2021 / Cosmic rays: a proxy to study solar transient events: Dr. Arun Babu (Universidad Nacional Autonoma de Mexico)

ICRR Seminar

 整理番号R2-8
 日時 January 22, 2021 15:30-17:00
 場所ZOOM : https://zoom.us/j/93686558705?pwd=VUFtc3dOcjlQTGRUVENGdjltSy90QT09
 講師 Dr. Arun Babu (Universidad Nacional Autonoma de Mexico)
 題名“Cosmic rays: a proxy to study solar transient events”
 概要などSolar modulation of galactic cosmic rays (GCRs) are well known for decades. Short period solar modulations like Forbush decreases are gaining importance because of its association with the solar transient events like coronal mass ejections (CMEs), which made the possibility of using GCR observations for space weather studies. In this talk, I will discuss the effects of CMEs in the near-Earth environment that studied using ground-based cosmic ray observations. I will discuss the major contributor of the CME/shock/sheath system to produce the Forbush decreases in GeV energies, followed by a discussion of the dependency of interplanetary solar wind parameters on the Forbush decreases and the viability of diffusion approximation. Finally, I will discuss a unique effects of an ideal magnetic flux-rope that affects the transport of GCRs inside the flux-rope.