SH036-0023
The study of low-frequency waves in the solar wind by the RPW/TDS instrument onboard Solar Orbiter
Monday, 14 December 2020
Poster
David Pisa1, Jan Soucek1, Ondrej Santolik1,2, Milan Maksimovic3, Stuart D Bale4, Thomas Chust5, Yuri Khotyaintsev6, Vladimir Krasnoselskikh7, Matthieu Kretzschmar8, Eric Lorfevre9, Dirk Plettemeier10, Manfred Steller11, Štěpán Štverák12, Pavel Travnicek12,13, Andris Vaivads14, Antonio Vecchio3,15, Timothy Simon Horbury16, Virginia Angelini17, Helen O'Brien16 and Vincent Evans17, (1)Institute of Atmospheric Physics of the Czech Academy of Sciences, Department of Space Physics, Prague, Czech Republic, (2)Charles University, Faculty of Mathematics and Physics, Prague, Czech Republic, (3)LESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Université de Paris, Meudon, France, (4)University of California Berkeley, Space Sciences Laboratory, Berkeley, CA, United States, (5)Laboratoire de Physique des Plasmas (UMR7648), CNRS/Ecole Polytechnique/UPMC/Univ. Paris Sud/Obs. de Paris, Paris, France, (6)IRF Swedish Institute of Space Physics, Uppsala, Sweden, (7)LPC2E, CNRS and University of Orléans, Orléans, France, (8)CNRS and University of Orléans, LPC2E, Orléans, France, (9)CNES French National Center for Space Studies, Toulouse Cedex 09, France, (10)Dresden University of Technology, Dresden, Germany, (11)Space Research Institute, Austrian Academy of Sciences, Graz, Austria, (12)Astronomical Institute of the Academy of Sciences, Prague, Czech Republic, (13)University of California, Berkeley, Space Sciences Laboratory, Berkeley, United States, (14)Royal Institute of Technology, KTH, Space and Plasma Physics, Stockholm, Sweden, (15)Radboud University, Department of Physics, Nijmegen, Netherlands, (16)Imperial College London, Department of Physics, London, SW7, United Kingdom, (17)Imperial College London, Department of Physics, London, United Kingdom
Abstract:
The Time Domain Sampler (TDS) receiver is a part of the Radio and Plasma Wave instrument (RPW) onboard Solar Orbiter, sampling three electric and one magnetic field components at frequencies up to 524 kHz. The RPW instrument has been operating almost continuously during the commissioning phase of the mission and through the first perihelion in June 2020, covering an interval of heliocentric distances between 0.5 AU to 1 AU. The most common plasma phenomena observed by TDS are low-frequency electrostatic waves at frequencies between hundreds of Hertz and 10 kHz. These are interpreted as strongly Doppler-shifted ion-acoustic waves, generated by solar wind ion beams and often accompanying large scale solar wind structures. In this initial study, we performed a statistical investigation of the waves, studying their modulation and polarization.
