29 July 2015 to 6 August 2015
World Forum
Europe/Amsterdam timezone

Resolving multiple sources of solar relativistic particles

30 Jul 2015, 11:15
15m
Mississippi (World Forum)

Mississippi

World Forum

Churchillplein 10 2517 JW Den Haag The Netherlands
Oral contribution SH-EX Parallel SH 01 SEP I

Speaker

Prof. Leon Kocharov (University of Oulu, Finland)

Description

We perform a comparative study of the time-profile morphology of solar high-energy particle emissions including relativistic electrons in three energy channels of SOHO/EPHIN, relativistic protons as registered by the worldwide network of neutron monitors, and ~100 MeV/n protons and helium in several energy channels of SOHO/ERNE. Based on numerical modeling of the interplanetary transport, we formulate a simple method for resolving the high-energy particle sources operating in solar corona during first hour of the high-energy particle events. The method is applied to Ground Level Enhancement (GLE) and Solar Energetic Particle (SEP) events of the solar cycle 23. We conclude that depending on the GLE-SEP event scenario and detector’s vantage point, the observed particles originate from up to three sources. Possible nature of the sources is discussed in the framework of previous and new models of the high-energy particle production associated with global coronal (EIT) waves and CME bow shocks within five solar radii from the Sun.
Registration number following "ICRC2015-I/" 127
Collaboration -- not specified --

Primary author

Prof. Leon Kocharov (University of Oulu, Finland)

Co-authors

Dr Andreas Klassen (Christian-Alberchts-Universität zu Kiel, Germany) Prof. Eino Valtonen (University of Turku, Finland) Prof. Ilya Usoskin (University of Oulu, Finland)

Presentation Materials