77 citations · 667 across the 38 of their papers we have counts for
7 papers · 1 filter
Photospheric magnetic structure of coronal holes
Stefan J. Hofmeister, Dominik Utz, Stephan G. Heinemann +2
In this study, we investigate in detail the photospheric magnetic structure of 98 coronal holes using line-of-sight magnetograms of SDO/HMI, and for a subset of 42 coronal holes us…
CME -- HSS interaction and characteristics tracked from Sun to Earth
Stephan G. Heinemann, Manuela Temmer, Charles J. Farrugia +9
In a thorough study, we investigate the origin of a remarkable plasma and magnetic field configuration observed in situ on June 22, 2011 near L1, which appears to be a magnetic eje…
Reconstructing coronal hole areas with EUHFORIA and adapted WSA model: optimising the model parameters
Eleanna Asvestari, Stephan G. Heinemann, Mannuela Temmer +4
The adopted WSA model embedded in EUHFORIA (EUropean Heliospheric FORecasting Information Asset) is compared to EUV observations. According to the standard paradigm coronal holes a…
A statistical study of long-term evolution of coronal hole properties as observed by SDO
Stephan G. Heinemann, Veronika Jerčić, Manuela Temmer +5
The study of the evolution of coronal holes (CHs) is especially important in the context of high-speed solar wind streams (HSS) emanating from them. Stream interaction regions may…
Statistical Analysis and Catalog of Non-polar Coronal Holes Covering the SDO-era using CATCH
Stephan G. Heinemann, Manuela Temmer, Niko Heinemann +5
Coronal holes are usually defined as dark structures as seen in the extreme ultraviolet and X-ray spectrum which are generally associated with open magnetic field. Deriving reliabl…
Unusual plasma and particle signatures at Mars and STEREO-A related to CME-CME interaction
Mateja Dumbovic, Jingnan Guo, Manuela Temmer +15
On July 25 2017 a multi-step Forbush decrease (FD) with the remarkable total amplitude of more than 15\% was observed by MSL/RAD at Mars. We find that these particle signatures are…
CME volume calculation from 3D GCS reconstruction
L. Holzknecht, M. Temmer, M. Dumbovic +6
The mass evolution of a coronal mass ejection (CME) is an important parameter characterizing the drag force acting on a CME as it propagates through interplanetary space. Spacecraf…