SH049-0003
The Shape and Motions of the Heliospheric Current Sheet Close to the Sun

Wednesday, 16 December 2020
Poster
Adam Szabo1, Shaela I Jones1, Justin Christophe Kasper2, Charles Nickolos Arge1, Stuart D Bale3, Michael Louis Stevens4, Anthony W Case4, Davin E Larson5, Phyllis L Whittlesey6, Marc Pulupa6, Robert J MacDowall7 and Andriy Koval1, (1)NASA Goddard Space Flight Center, Greenbelt, MD, United States, (2)University of Michigan, Climate and Space Sciences and Engineering, Ann Arbor, MI, United States, (3)University of California Berkeley, Space Sciences Laboratory, Berkeley, CA, United States, (4)Smithsonian Astrophysical Observatory, Cambridge, MA, United States, (5)Space Sciences Laboratory, Berkeley, CA, United States, (6)Space Sciences Laboratory, University of California Berkeley, Berkeley, CA, United States, (7)NASA/Goddard Space Flight Center, Greenbelt, United States
Abstract:
PSP observations of the crossing of the Heliospheric Current Sheet (HCS) from the first five orbits are compared to PFSS model predictions. The distance of the spacecraft from the best fitting model HCS is determined. The same model predictions are also evaluated in time to determine the predicted motion in longitude and latitude of the HCS. These predicted motions are compared to in-situ measurements of solar wind plasma flows perpendicular to the radial direction. The results are compared to the expectations from coronal circulation models.
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