[IGPP Everyone] Reminder - SPACE SCIENCE SEMINAR - Spring Quarter - 3:30pm -Friday May 22, 2020 - CCLE Zoom
Marjorie Sowmendran
margie at igpp.ucla.edu
Thu May 21 08:08:41 PDT 2020
Reminder
SPACE PHYSICS SEMINAR
USE THE CCLE ZOOM LINK PROVIDED BELOW
https://ccle.ucla.edu/mod/zoom/view.php?id=2939559
Date/Time: May 22, 2020/ 03:30 PM Pacific Time (US and Canada)
SPACE PHYSICS SEMINAR
DEPARTMENT OF EARTH, PLANETARY, AND SPACE SCIENCES
DEPARTMENT OF ATMOSPHERIC AND OCEANIC SCIENCES
UNIVERSITY OF CALIFORNIA, LOS ANGELES
(AOS M275B, EPSS M288B)
Observations and Impressions of Electron-Only Reconnection in Earth’s Magnetotail
Mark Hubbert
Department of Earth, Planetary, and Space Sciences, UCLA
Abstract: Magnetic reconnection occurs throughout the Solar System and transfers energy from the magnetic field to the surrounding plasma. One observational characteristic indicative of “traditional” magnetic reconnection in Earth’s magnetotail is electron exhaust outflow embedded in larger scale ion exhaust outflow. The ongoing Magnetosphere Multiscale (MMS) mission has the proper spatial separation/configuration to analyze electron-scale physics in the context of magnetic reconnection. In 2018, Phan et al. used MMS to observe a reconnecting electron-scale current sheet in Earth’s magnetosheath that featured electron exhaust outflows but lacked the ion exhaust outflows expected in “traditional” reconnection. That same year, Wang et al. observed a similar phenomenon in the plasma sheet of Earth’s magnetotail. This process has been deemed “Electron-Only Reconnection” or “Electron Reconnection” due to the electron-scale thickness of the reconnecting current sheet and the lack of ion response observed during these intervals. Although recent simulations have successfully generated “electron-only reconnection” as a product of sub-ion scale plasma turbulence, its physical mechanism in Earth’s magnetotail remains unclear. In this seminar, we show additional MMS observations of “electron-only reconnection” in Earth’s magnetotail, compare their features, and pose a physical mechanism that is consistent with our observations.
Friday May 22, 2020
In-charge: C. T. Russell
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