Freiburg 2008 – scientific programme
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EP: Fachverband Extraterrestrische Physik
EP 4: The Sun and Heliosphere - Poster Session
EP 4.11: Poster
Monday, March 3, 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.