Freiburg 2008 – wissenschaftliches Programm

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EP: Fachverband Extraterrestrische Physik

EP 4: The Sun and Heliosphere - Poster Session

EP 4.11: Poster

Montag, 3. März 2008, 17:30–19:00, Vorraum KGI-Aula

Suprathermal particles in CIRs at 1 AU — •Lars Berger¹, Muharrem Köten¹, Roland Rodde¹, George Gloeckler², Robert F. Wimmer-Schweingruber¹, Raul Gomez-Herrero¹, Bernd Heber¹, Reinhold Müller-Mellin¹, and Andreas Klassen¹ — ¹Institut fur Experimentelle und Angewandte Physik, University of Kiel, D-24098 Kiel, Germany — ²Institute for Physical Science and Technology, University of Maryland, College Park, MD 20742, USA

Because of their already high energy, suprathermal particles likely serve as the source population for further acceleration at interplanetary shocks. The very low solar activity in 2007 and the recurrent corotating particle events make 2007 an ideal time period to study the abundance of non-flare associated, i.e. quiet-time, suprathermal particles. Using a maximum-likelihood method based on Poissonian statistics which is well adapted to deriving fluxes from small count numbers, we determine the fluxes of suprathermal particles in 2007. We will present results for CIRs, high-speed streams, slow wind, and solar wind dwells.