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Solar and heliospheric sources of suprathermal and energetic particle populations

Kiraly, P. and Axford, W. I. and Daibog, E. I. and Heber, B. and Kallenbach, R. and Kecskemety, K. and Mason, G. M. and Logacheb, Y. I. and Mewaldt, R. A. and Posner, A. and Rodriguez-Pacheco, J. and Treumann, R. and Zeldovich, M. A. (2005) Solar and heliospheric sources of suprathermal and energetic particle populations. In: Proceedings of the 29th International Cosmic Ray Conference. Vol.1. Tata Institute of Fundamental Research , Mumbai, India, pp. 67-70.

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Objectives and some preliminary findings of an ongoing international team project carried out at ISSI, Bern will be presented. Suprathermal and energetic particle s in interplanetary space have a multitude of origins, i.e. acceleration and propagation hi stories. Solar flares, coronal mass ejections (CMEs), co-rotating interaction regions (CIRs), the heliospheric termination shock, planetary bow shocks and magnetospheres have all been recognized as energetic particle sources. Less energetic (suprathermal) particles of solar origin and pick-up ions have also a vital role both in their own right and as seeds of energetic particles accelerated in interplanetary disturbances. The relative contributions of various particle populations vary with energy and with the phase of the solar cycle. Particular attention will be given in our project to quiet periods and to large events. While quiet-time fluxes are expected to shed light on some base-line features of coronal and interplanetary acceleration processes, relatively large events dominate bot h the long-term fluence levels and the statistical properties of cumulative fluence plots. The importance of energetic and suprathermal particles that mostly cannot escape into interplanetary space, but contribute to co ronal heating and possibly also to solar wind composition, will also be discussed. B. Sripathi Acharya, Sunil Gupta, P. Jagadeesan, Atul Jain, S. Karthikeyan, Samuel Morris, and Suresh Tonwar

Item Type:Book Section
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URLURL TypeDescription
Mason, G. M.0000-0003-2169-9618
Mewaldt, R. A.0000-0003-2178-9111
Additional Information:Financial and organizational support of the International Space Science Institute (Bern) is gratefully acknowledged.
Group:Space Radiation Laboratory
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Space Radiation Laboratory2005-09
Record Number:CaltechAUTHORS:20150326-150613018
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:56150
Deposited By: Deborah Miles
Deposited On:15 Apr 2015 02:59
Last Modified:22 Nov 2019 09:58

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