Search Publications

Observation of a propagating slow magnetoacoustic wave in a coronal plasma fan with SDO/AIA and SolO/EUI

Nakariakov, Valery M.; Kolotkov, Dmitrii Y.; Zhong, Sihui +1 more

Simultaneous observations of a propagating disturbance of EUV intensity, with SDO/AIA at 171 Å and SolO/EUI-HRIEUV at 174 Å, are investigated. The disturbance moves outwards along a plasma fan structure in active region AR 12941 on February 7th 2022, at 12:45-14:15 UT. The spacecraft line-of-sight separation is 19°. The variation of the EUV intens…

Highly collisional regions determined by interplanetary magnetic field structures

Lai, H. R.; Russell, C. T.; Jia, Y. D. +3 more

Submicron debris released in interplanetary collisions gets charged in the solar wind and generates disturbances to the magnetic field environment. The unique magnetic field disturbances, named interplanetary field enhancements (IFEs) are recorded by many spacecraft. In this study, we have developed a novel model to trace the IFEs to their origins…

First joint X-ray solar microflare observations with NuSTAR and Solar Orbiter/STIX

Krucker, Säm; Jeffrey, Natasha L. S.; Grefenstette, Brian W. +5 more

We present the first joint spectral and imaging analysis of hard X-ray (HXR) emission from three microflares observed by the Nuclear Spectroscopic Telescope ARray (NuSTAR) and Solar Orbiter/Spectrometer/Telescope for Imaging X-rays (STIX). We studied 5 joint spectra from GOES A7, B1, and B6 class microflares from active region AR12765 on 2020 June…