[IGPP Everyone] Today -Reminder - SPACE PHYSICS and HERMES SCIENCE CENTER SEMINAR - Fall Quarter - Friday October 30, 2020 - 3:30pm - UCLA Zoom

[Marjorie Sowmendran]

R E M I N D E R 

T O D A Y 


SPACE PHYSICS and HERMES SCIENCE CENTER SEMINAR 




ZOOM LINK PROVIDED BELOW 








https://ucla.zoom.us/j/93382900867?pwd=TlVQRmZyVEJFa0FCZWlRMU0yREtjUT09 







Date/Time: October 30, 2020/ 03:30 PM Pacific Time (US and Canada) 







SPACE PHYSICS and HERMES SCIENCE CENTER SEMINAR 






DEPARTMENT OF EARTH, PLANETARY, AND SPACE SCIENCES 

DEPARTMENT OF ATMOSPHERIC AND OCEANIC SCIENCES 

UNIVERSITY OF CALIFORNIA, LOS ANGELES 



Solar sources for Parker Solar Probe in situ measurements 

Olga Panasenco, 
Advanced Heliophysics, Pasadena, CA 
Parker Solar Probe (PSP), launched on August 12th, 2018 has begun the most detailed exploration of the inner heliosphere to date, moving 50% closer than the Helios spacecraft already during its first encounter in November 2018. Since then, after three orbits with a perihelion at 35.7 solar radii, Probe has completed two subsequent orbits with perihelia at 26.9 Rs, encounters 4 and 5 in January and June, 2020 (data from the latest encounter 6, end of September, is yet to be analyzed). Over the first encounters, observations of the magnetic field and velocity showed that PSP crossed the heliospheric current sheet multiple times and wind speeds were predominantly very slow (Vr ~ 300 km/s), with some excursions into higher speed winds Vr ~ 400-600 km/s. Nonetheless the wind displayed a strongly dominant outward propagating spectrum of Alfvénic fluctuations throughout the encounters, a feature that is rarely seen in very slow solar wind streams at Earth and beyond. Encounters 4 and 5, closer to the Sun , occurred right at the beginning of Solar Cycle 25. Over encounter 4 an active region from the new cycle appeared in the southern hemisphere while at the same time an active region of the previous cycle was present in the northern hemisphere not far from the equator and longitudes explored by Probe. This seminar will explore the Parker Solar Probe connectivity to the Sun in encounters E1- E5, focusing on the magnetic configurations in the solar corona and heliosphere and their relation to the plasma structures observed in situ by Probe, and how these may be used to learn about solar wind origins and types. 



Friday, October 30, 2020 

3:30 - 5:00 PM 



In-Charge: Marco Velli 













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