| Title: |
Electrostatic Waves with Rapid Frequency Shifts in the Solar Wind Sunward of 1/3 AU |
| Authors: |
Kromyda, Lily; Malaspina, David M.; Ergun, Robert E.; Halekas, Jasper; Stevens, Michael L.; Verniero, Jennifer L.; Vech, Daniel; Chasapis, Alexandros; Bale, Stuart D.; Bonnell, John W.; Dudok de Wit, Thierry; Goetz, Keith; Goodrich, Katherine; Harvey, Peter R.; Macdowall, Robert J.; Pulupa, Marc; Case, Anthony W.; Kasper, Justin C.; Korreck, Kelly E.; Larson, Davin E. |
| Contributors: |
Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (LPC2E); Observatoire des Sciences de l'Univers en région Centre (OSUC); Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris; Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris; Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales Paris (CNES) |
| Source: |
vEGU21 ; https://insu.hal.science/insu-03559280 ; vEGU21, 2021, Online, France. ⟨10.5194/egusphere-egu21-16103⟩ |
| Publisher Information: |
HAL CCSD |
| Publication Year: |
2021 |
| Collection: |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
| Subject Terms: |
[SDU]Sciences of the Universe [physics] |
| Subject Geographic: |
Online; France |
| Description: |
International audience ; During its first five orbits, the FIELDS plasma wave investigation on board Parker Solar Probe (PSP) has observed a multitude of plasma waves, including electrostatic whistler and electron Bernstein waves (Malaspina et al. 2020), sunward propagating whistlers (Agapitov et al. 2020), ion-scale electromagnetic waves (Verniero et al. 2020, Bowen et al. 2020) and Alfven, slow and fast mode waves (Chaston et al. 2020).The importance of these waves lies in their potential to redistribute the energy of the solar wind among different particles species (wave-particle interactions) or different types of waves (wave-wave interactions). The abundance of waves and instabilities observed with PSP points to their central role in the regulation of this energy exchange.Here we present first observations of an intermittent, electrostatic and broadband plasma wave that is ubiquitous in the range of distances that PSP has probed so far. A unique feature of these waves (FDWs) is a frequency shift that occurs on millisecond timescales. In the frame of the spacecraft, FDWs usually appear between the electron cyclotron and electron plasma frequencies.We develop a detection algorithm that identifies the FDWs in low cadence spectra. We analyze them using various statistical techniques. We establish their phenomenology and compare the magnetic fluctuations of the background magnetic field at times of FDWs and at times without FDWs. We establish their polarization with respect to the background magnetic field and search for correlations with various plasma parameters and features in the electron, proton and alpha particle distribution moments. We also investigate possible plasma wave modes that could be responsible for the growth of FDWs and the instability mechanisms that could be generating them. Lily Kromyda*(1), David M. Malaspina (1,2), Robert E. Ergun(1,2) , Jasper Halekas(3), Michael L. Stevens(4) , Jennifer Verniero(5), Alexandros Chasapis(2) , Daniel Vech(2) , Stuart D. Bale(5,6) , John W. Bonnell(5) , ... |
| Document Type: |
conference object |
| Language: |
English |
| Relation: |
insu-03559280; https://insu.hal.science/insu-03559280; https://insu.hal.science/insu-03559280/document; https://insu.hal.science/insu-03559280/file/EGU21-16103-print.pdf; BIBCODE: 2021EGUGA.2316103K |
| DOI: |
10.5194/egusphere-egu21-16103 |
| Availability: |
https://insu.hal.science/insu-03559280; https://insu.hal.science/insu-03559280/document; https://insu.hal.science/insu-03559280/file/EGU21-16103-print.pdf; https://doi.org/10.5194/egusphere-egu21-16103 |
| Rights: |
http://creativecommons.org/licenses/by/ ; info:eu-repo/semantics/OpenAccess |
| Accession Number: |
edsbas.212987C8 |
| Database: |
BASE |