Please use this identifier to cite or link to this item: http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/7451
Title: Turbulence and Anomalous Resistivity inside Near-Earth Magnetic Clouds
Authors: BHATTACHARJEE, DEBESH
SUBRAMANIAN, PRASAD
Nieves-Chinchilla, Teresa
Vourlidas, Angelos
Dept. of Physics
Keywords: Turbulence, (magnetohydrodynamics) MHD
Methods: statistical
Sun: coronal mass ejections (CMEs)
2022-NOV-WEEK1
TOC-NOV-2022
2023
Issue Date: Jan-2023
Publisher: Oxford University Press
Citation: Monthly Notices of the Royal Astronomical Society, 518(1), 1185–1194.
Abstract: We use in-situ data from the Wind spacecraft to survey the amplitude of turbulent fluctuations in the proton density and total magnetic field inside a large sample of near-Earth magnetic clouds (MCs) associated with coronal mass ejections (CMEs) from the Sun. We find that the most probable value of the modulation index for proton density fluctuations (δnp/np) inside MCs ranges from 0.13 to 0.16, while the most probable values for the modulation index of the total magnetic field fluctuations (δB/B) range from 0.04 to 0.05. We also find that the most probable value of the Mach number fluctuations (δM) inside MCs is ≈0.1. The anomalous resistivity inside near-Earth MCs arising from electron scattering due to turbulent magnetic field fluctuations exceeds the (commonly used) Spitzer resistivity by a factor of ≈500 − 1000. The enhanced Joule heating arising from this anomalous resistivity could impact our understanding of the energetics of CME propagation.
URI: https://doi.org/10.1093/mnras/stac3186
http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/7451
ISSN: 1365-2966
0035-8711
Appears in Collections:JOURNAL ARTICLES

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