5 papers
Formation of a Coronal Hole by a quiet-Sun Filament Eruption
Stefan J. Hofmeister, Eleanna Asvestari, Karin Dissauer +9
A coronal hole formed as a result of a quiet-Sun filament eruption close to the solar disk center on 2014 June 25. We studied this formation using images from the Atmospheric Imagi…
Velocity and Density Fluctuations in the Quiet Sun Corona
Michael Hahn, Xiangrong Fu, Stefan J. Hofmeister +3
We investigate the properties and relationship between Doppler-velocity fluctuations and intensity fluctuations in the off-limb quiet Sun corona. These are expected to reflect the…
Elemental Abundances at Coronal Hole Boundaries as a Means to Investigate Interchange Reconnection and the Solar Wind
Alexandros Koukras, Daniel W. Savin, Michael Hahn
The origin of the slow solar wind is not well understood, unlike the fast solar wind which originates from coronal holes. In-situ elemental abundances of the slow solar wind sugges…
Revised Point-Spread Functions for the Atmospheric Imaging Assembly onboard the Solar Dynamics Observatory
Stefan Hofmeister, Daniel Wolf Savin, Michael Hahn
We present revised point-spread functions (PSFs) for the Atmospheric Imaging Assembly (AIA) onboard the Solar Dynamics Observatory (SDO). These PSFs provide a robust estimate of th…
Measurement of energy reduction by inertial Alfvén waves propagating through parallel gradients in the Alfvén speed
Garima Joshi, Sayak Bose, Troy Carter +4
We have studied the propagation of inertial Alfvén waves through parallel gradients in the Alfvén speed using the Large Plasma Device at the University of California, Los Angeles…