SH020:
Disentangling Expansion Effects, Collisionless Processes, and Collisional Relaxation in the Solar Wind





Session ID#: 22958

Session Description:
Particle distribution functions in the solar wind often exhibit kinetic structures including temperature anisotropies, relative drifts, and beams. Such deviations from thermal equilibrium indicate the weak collisionality of the solar wind.  Nevertheless, studies of collisional age have revealed that particle collisions do affect the overall evolution of solar wind plasma as it expands through the heliosphere. A complete, physics-based description of the solar wind must include macrophysical expansion effects, microphysical collisionless processes, and Coulomb collisions. Even so, the interplay among these phenomena remains poorly understood. This session addresses how the combined actions of expansion, collective plasma processes (such as wave-particle interactions), and collisional relaxation determine the state of the solar wind. We solicit contributions based on observational, theoretical, and numerical studies to stimulate an interdisciplinary discussion of global and local plasma effects in the solar wind.
Primary Convener:  Bennett Maruca, University of Delaware, Department of Physics and Astronomy, Newark, DE, United States
Conveners:  Daniel Verscharen1, Kristopher Gregory Klein2 and Benjamin L Alterman2, (1)University College London, Mullard Space Science Laboratory, Dorking, United Kingdom(2)University of Michigan Ann Arbor, Ann Arbor, MI, United States
Index Terms:

7829 Kinetic waves and instabilities [SPACE PLASMA PHYSICS]
7859 Transport processes [SPACE PLASMA PHYSICS]
7863 Turbulence [SPACE PLASMA PHYSICS]
7867 Wave/particle interactions [SPACE PLASMA PHYSICS]

Abstracts Submitted to this Session:

Kelly E Korreck, Smithsonian Astrophysical Observatory, Cambridge, MA, United States, Kristopher Gregory Klein, University of Iowa, Iowa City, IA, United States, Bennett Maruca, Center for Astrophysics, Berkeley, CA, United States and Benjamin L Alterman, University of Michigan, Ann Arbor, MI, United States
Shaaban Mohammed Shaaban Hamd, Katholieke Universiteit Leuven, Leuven, Belgium, Marian Lazar, Ruhr University Bochum, Bochum, Germany, Stefaan Poedts, KU Leuven, Leuven, Belgium, Viviane Pierrard, Belgian Institute for Space Aeronomy, Brussels, Belgium and Štěpán Štverák, Institute of Atmospheric Physics, Czech Academy of Sciences, Prague, Czech Republic
Bennett Maruca1, Ramiz Qudzi2, Petr Hellinger3, Michael Louis Stevens4, Justin Christophe Kasper4 and Kelly E Korreck4, (1)University of Delaware, Department of Physics and Astronomy, Newark, DE, United States, (2)University of Delaware, Department of Physics & Astronomy, Newark, DE, United States, (3)Astronomical Institute & Institute of Atmospheric Physics, AS CR, Prague, Czech Republic, (4)Smithsonian Astrophysical Observatory, Cambridge, MA, United States
Lorenzo Matteini1, Petr Hellinger2, Simone Landi3, Filippo G E Pantellini4, Marco Velli5, Luca Franci3 and Andrea Verdini3, (1)Observatoire de Paris, Meudon, France, (2)Astronomical Institute & Institute of Atmospheric Physics, AS CR, Prague, Czech Republic, (3)University of Florence, Florence, Italy, (4)CNRS, Observatoire de Paris, LESIA, Meudon, France, (5)University of California Los Angeles, Los Angeles, CA, United States
Stepan Stverak1,2, Petr Hellinger3, Simone Landi4, Pavel M. Travnicek1,5 and Milan Maksimovic6, (1)Astronomical Institute AS CR, Prague, Czech Republic, (2)Institute of Atmospheric Physics ACSR, Praha 4, Czech Republic, (3)Astronomical Institute & Institute of Atmospheric Physics, AS CR, Prague, Czech Republic, (4)University of Florence, Florence, Italy, (5)University of California Berkeley, Space Sciences Laboratory, Berkeley, CA, United States, (6)CNRS, Paris Cedex 16, France
Bart van der Holst1, Benjamin D G Chandran2, Benjamin L Alterman3, Justin Christophe Kasper3 and Gabor Toth3, (1)University of Michigan Ann Arbor, Department of Climate and Space Sciences and Engineering, Ann Arbor, MI, United States, (2)University of New Hampshire, Durham, NH, United States, (3)University of Michigan, Ann Arbor, MI, United States
Georgina Alessandra Graham1, Jonathan Rae2, Christopher John Owen3, Andrew P Walsh4, Christopher Stephen Arridge5, Lin Gilbert3, Gethyn R Lewis6, Geraint Jones7, Colin Forsyth8, Andrew J Coates9 and Jack H Waite Jr10, (1)Mullard Space Science Laboratory, Dorking, RH5, United Kingdom, (2)University College London, Mullard Space Science Laboratory, London, United Kingdom, (3)University College London, London, United Kingdom, (4)European Space Agency, Villanueva De La Can, Spain, (5)Lancaster University, Department of Physics, Lancaster, United Kingdom, (6)University College London, Space and Climate Physics (Mullard Space Science Laboratory), Dorking, United Kingdom, (7)Mullard Space Science Laboratory, Dorking, United Kingdom, (8)Mullard Space Science Lab., Dorking, United Kingdom, (9)The Centre for Planetary Sciences at UCL/Birkbeck, London, United Kingdom, (10)Department of Space Science, Southwest Research Institute, San Antonio, United States
Benjamin L Alterman1, Kristopher Gregory Klein2, Daniel Verscharen3, Michael Louis Stevens4 and Justin Christophe Kasper4, (1)University of Michigan Ann Arbor, Ann Arbor, MI, United States, (2)University of Iowa, Iowa City, IA, United States, (3)University College London, Mullard Space Science Laboratory, Dorking, United Kingdom, (4)Smithsonian Astrophysical Observatory, Cambridge, MA, United States
Yuguang Tong1, Stuart D Bale1, Chadi S Salem2 and Marc Pulupa3, (1)University of California Berkeley, Berkeley, CA, United States, (2)University of California, Berkeley, CA, United States, (3)Univ California Berkeley, Berkeley, CA, United States
Yana G Maneva, Katholieke Universiteit Leuven, Leuven, Belgium and Stefaan Poedts, KU Leuven, CmPA, Dover, NH, United States
Konstantinos Horaites1, Stanislav Boldyrev1,2, Lynn B Wilson III3, Adolfo Figueroa-Vinas3 and Jan Merka4, (1)University of Wisconsin Madison, Madison, WI, United States, (2)Space Science Institute Boulder, Boulder, CO, United States, (3)NASA Goddard Space Flight Center, Greenbelt, MD, United States, (4)University of Maryland Baltimore County, Goddard Planetary Heliophysics Institute, Baltimore, MD, United States
Jungjoon Seough, KASI Korea Astronomy and Space Science Institute, Daejeon, Korea, Republic of (South)