000007762 001__ 7762
000007762 005__ 20260108103711.0
000007762 037__ $$aPOSTER-2026-0016
000007762 100__ $$aShrivastav, Arpit Kumar 
000007762 245__ $$aProbing Dynamics in a Pseudostreamer using Inner and Middle Corona Observations of Solar Orbiter
000007762 260__ $$c2025
000007762 269__ $$c2025-12-19
000007762 500__ $$aSH51E-1211
000007762 520__ $$aLarge-scale coronal structures, such as streamers and pseudostreamers, are potential sources of the slow solar wind, contributing to its structured nature and variability. However, the mechanisms driving solar wind generation within these structures remain poorly understood. In this study, we analyzed a pseudostreamer observed on the limb using the Full Sun Imager (FSI), with its footpoints captured by the High Resolution Imager (HRIEUV) and Spectroscopic Imaging of the Coronal Environment (SPICE). HRIEUV observations show the presence of propagating disturbances (PDs) near the footpoints, extending to heights of 50–60 Mm in several open strands of the pseudostreamer. The projected velocities of these PDs ranged from 27 to 250 km/s, with an average of 121±48 km/s. The PDs are periodic with an average of ~ 11 minutes in these open magnetic strands. SPICE provides Doppler velocity maps in these regions, indicating the presence of blueshifts near the pseudostreamer base. Additionally, the FSI imaging sequence indicates signatures of downflows arising from interactions between open and closed magnetic field structures within the pseudostreamer. The dynamics within the pseudostreamer and the presence of PDs at the base shed light on the origin of the solar wind in large-scale structures. The identified PDs could contribute to plasma transport into the outer corona, guided by the magnetic topology of the pseudostreamer, and provide mass flux to the solar wind.
000007762 594__ $$aSTCE
000007762 6531_ $$aSolar Orbiter
000007762 6531_ $$aEUI
000007762 6531_ $$apsuedostreamer
000007762 6531_ $$amiddle corona
000007762 700__ $$aBose, Rohan  
000007762 700__ $$aMolnar, Momchil  
000007762 700__ $$aPlowman, Joseph  
000007762 700__ $$aChitta, Lakshmi Pradeep  
000007762 700__ $$aPant, Vaibhav  
000007762 700__ $$aHassler, Don  
000007762 700__ $$aSeaton, Daniel B  
000007762 700__ $$aPatel, Ritesh  
000007762 700__ $$aMierla, Marelina  
000007762 700__ $$aZhukov, Andrei 
000007762 700__ $$aBerghmans, David 
000007762 773__ $$tAGU Annual Meeting, New Orleans LA
000007762 8560_ $$fdavid.berghmans@ksb-orb.be
000007762 85642 $$ahttps://agu.confex.com/agu/agu25/meetingapp.cgi/Paper/1965346
000007762 980__ $$aCPOSTER