Near-Sun Observations of CMEs with WSIPR on Parker Solar Probe in April 2021
Abstract
During the pre-encounter days from April 20 to 27, 2021, more than 20 CMEs have been identified in observations made by the WISPR inner telescope onboard the Parker Solar Probe (PSP) spacecraft. The WISPR CME observations reveal unprecedented fine structures compared to previous observations from near-Earth orbit. The PSP trajectory during the 8th encounter with a perihelion of below 15,7 solar radii on April 29, following its 4th Venus flyby in February 2021, was ideally suited to compare the WISPR observations with simultaneous STEREO/SECCHI/COR2A/HI1A and SOHO/LASCO/C2/C3 observations from near-Earth orbit and with observations of the low corona made in EUV wavelengths by SDO and STEREO/SECCHI/EUVI A. Here we present a summary of the physics characteristics of the observed CMEs, their near-Sun evolution and interactions seen in white-light. The identification of their solar origins in SDO/AIA and STEREO/EUVIA, and the results derived from the multipoint studies have important implications for a better understanding of the heliospheric manifestations of the solar photospheric and coronal magnetic fields.
- Publication:
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44th COSPAR Scientific Assembly. Held 16-24 July
- Pub Date:
- July 2022
- Bibcode:
- 2022cosp...44.1461B