SH049-0017
Whistler wave properties during PSP’s encounter 1 - First results from SCM cross-spectral data
Wednesday, 16 December 2020
Poster
Clara Froment1, Vladimir Krasnoselskikh2, Oleksiy V Agapitov3, Thierry Dudok de Wit4, David Malaspina5, Vamsee Krishna Jagarlamudi4, Matthieu Kretzschmar6, Andrea Larosa2, Stuart D Bale7, John W Bonnell8, Anthony W Case9, Keith Goetz10, Justin Christophe Kasper11, Kelly E Korreck9, Davin E Larson12, Roberto Livi13, Robert J. MacDowall14, Michel Moncuquet15, Forrest Mozer16, Marc Pulupa13, Claire Revillet6, Michael Louis Stevens9 and Phyllis L Whittlesey13, (1)LPC2E, CNRS/University of Orléans/CNES, Orléans, France, (2)Laboratoire de Physique et Chimie de l'Environnement et de l'Espace, Orléans Cedex 2, France, (3)Space Science Laboratory, UCB, Berkeley, CA, United States, (4)LPC2E, CNRS and University of Orléans, Orléans, France, (5)University of Colorado, Astrophysical and Planetary Sciences Department, Boulder, CO, United States, (6)CNRS and University of Orléans, LPC2E, Orléans, France, (7)University of California Berkeley, Space Sciences Laboratory, Berkeley, CA, United States, (8)University of California, Berkeley, Space Sciences Laboratory, Berkeley, CA, United States, (9)Smithsonian Astrophysical Observatory, Cambridge, MA, United States, (10)University of Minnesota, School of Physics and Astronomy, Minneapolis, MN, United States, (11)University of Michigan, Climate and Space Sciences and Engineering, Ann Arbor, MI, United States, (12)Space Sciences Laboratory, Berkeley, CA, United States, (13)Space Sciences Laboratory, University of California Berkeley, Berkeley, CA, United States, (14)NASA Goddard SFC, Greenbelt, MD, United States, (15)LESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Université de Paris, Meudon, France, (16)University of California, Berkeley, Berkeley, CA, United States
Abstract:
Whistler waves were widely observed during the first solar encounters of Parker Solar Probe. The interaction of these electromagnetic waves with the strahl electrons is known to affect the heat flux and PSP brings the first opportunity to study them in the young solar wind. We present several examples of whistler wave analysis during PSP’s 1st encounter. We mainly use cross spectra (full spectral matrices from 20 Hz - 4.5 kHz) of the magnetic field, as measured by the Search-Coil Magnetometer (SCM) that is part of the FIELDS experiment.
In this study, we 1) check the spectral matrices by comparing them to waveforms (for the few low-frequency whistlers), 2) determine their wave properties (planarity, ellipticity, polarization) and 3) connect these properties to their signatures in the electric field (EFI electric field antennas) and 4) eventually determine the wave characteristics using the solar wind magnetic field (MAG Fluxgate Magnetometer) and density from QTN (Quasi-Thermal Noise from FIELDS) and SWEAP observations.
