77 citations · 667 across the 38 of their papers we have counts for
39 papers
P2D - A Two-Dimensional Multi-Spacecraft Solar Wind Persistence Model
Daniel Milošić, Manuela Temmer, Stephan G. Heinemann +2
The background solar wind is a key component in space weather forecasting, as it contains geoeffective high-speed streams and provides the medium through which coronal mass ejectio…
Coronal Mass Ejection and Heliospheric Current Sheet Interaction Causing a Long-Duration Magnetic Field Sector Transition
Manuela Temmer, Stephan G. Heinemann, Nina Dresing +2
We present a study that combines remote-sensing and in-situ observations of coronal mass ejections (CMEs) interacting with the nearby heliospheric current sheet (HCS). The sequence…
Early Evolution of Earth-Directed Coronal Mass Ejections in the Vicinity of Coronal Holes
Suresh Karuppiah, Mateja Dumbović, Karmen Martinić +3
We investigate the deflection and rotation behavior of 49 Earth-directed coronal mass ejections (CMEs) spanning the period from 2010 to 2020 aiming to understand the potential infl…
Magnetic Topology and Loop Statistics in Observed Coronal Holes Using Potential Field Modeling
Stephan G. Heinemann, Jens Pomoell, Manuela Temmer
Potential Field Source Surface (PFSS) models are widely used to study the solar corona and form the basis for solar wind forecasting, yet often fail to reproduce observed propertie…
Evaluating Solar Wind Forecast Using Magnetic Maps That Include Helioseismic Far-Side Information
Stephan G. Heinemann, Dan Yang, Shaela I. Jones +5
To model the structure and dynamics of the heliosphere well enough for high-quality forecasting, it is essential to accurately estimate the global solar magnetic field used as inne…
Oscillations of the solar photospheric magnetic field caused by the m = 1 high-latitude inertial mode
Stephan G. Heinemann, Zhi-Chao Liang, Laurent Gizon
Periodic oscillations at 338 nHz in the Earth frame are observed at high latitudes in direct Doppler velocity measurements. These oscillations correspond to the high-latitude…
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…
Quantifying Uncertainties in Solar Wind Forecasting Due to Incomplete Solar Magnetic Field Information
Stephan G. Heinemann, Jens Pomoell, Ronald M. Caplan +5
Solar wind forecasting plays a crucial role in space weather prediction, yet significant uncertainties persist due to incomplete magnetic field observations of the Sun. Isolating t…
Combined Surface Flux Transport and Helioseismic Far-side Active Region Model (FARM)
Dan Yang, Stephan G. Heinemann, Robert H. Cameron +1
Maps of the magnetic field at the Sun's surface are commonly used as boundary conditions in space-weather modeling. However, continuous observations are only available from the Sun…
The influence of different coronal hole geometries on simulations of coronal wave -- coronal hole interaction
I. Piantschitsch, J. Terradas, E. Soubrie +4
The geometry of a coronal hole (CH) affects the density profile of the reflected part of an incoming global coronal wave (CW). In this study, we perform for the first time magnetoh…
On the Origin of the sudden Heliospheric Open Magnetic Flux Enhancement during the 2014 Pole Reversal
Stephan G. Heinemann, Mathew J. Owens, Manuela Temmer +12
Coronal holes are recognized as the primary sources of heliospheric open magnetic flux (OMF). However, a noticeable gap exists between in-situ measured OMF and that derived from re…
Classification of Enhanced Geoeffectiveness Resulting from High-Speed Solar Wind Streams Compressing Slower Interplanetary Coronal Mass Ejections
Stephan G. Heinemann, Chaitanya Sishtla, Simon Good +2
High-speed solar wind streams (HSSs) interact with the preceding ambient solar wind to form Stream Interaction Regions (SIRs), which are a primary source of recurrent geomagnetic s…
Unveiling the Journey of a Highly Inclined CME: Insights from the March 13, 2012 Event with 110 Longitudinal Separation
F. Carcaboso, M. Dumbovic, C. Kay +8
A fast and wide Coronal Mass Ejection (CME) erupted from the Sun on 2012-03-13. Its interplanetary counterpart was detected in situ two days later by STEREO-A and near-Earth spacec…
Coronal Models and Detection of Open Magnetic Field
Eleanna Asvestari, Manuela Temmer, Ronald M. Caplan +11
A plethora of coronal models, from empirical to more complex magnetohydrodynamic (MHD) ones, are being used for reconstructing the coronal magnetic field topology and estimating th…
On the short term stability and tilting motion of a well-observed low-latitude solar coronal hole
Stephan G. Heinemann, Stefan J. Hofmeister, James A. Turtle +5
The understanding of the solar magnetic coronal structure is tightly linked to the shape of open field regions, specifically coronal holes. A dynamically evolving coronal hole coin…
The role of initial density profiles in simulations of coronal wave - coronal hole interaction
I. Piantschitsch, J. Terradas, E. Soubrie +4
Interactions between global coronal waves (CWs) and coronal holes (CHs) reveal many interesting features of reflected waves and coronal hole boundaries (CHB) but have fairly been s…
CME Propagation Through the Heliosphere: Status and Future of Observations and Model Development
M. Temmer, C. Scolini, I. G. Richardson +31
The ISWAT clusters H1+H2 have a focus on interplanetary space and its characteristics, especially on the large-scale co-rotating and transient structures impacting Earth. SIRs, gen…
Differences in physical properties of coronal bright points and their ALMA counterparts within and outside coronal holes
F. Matković, R. Brajša, M. Temmer +6
This study investigates and compares brightness and area of coronal bright points (CBPs) inside and outside of coronal holes (CHs) using the single-dish Band 6 observations by the…
Influence of coronal hole morphology on the solar wind speed at Earth
Evangelia Samara, Jasmina Magdalenic, Luciano Rodriguez +4
It has long been known that the high-speed stream (HSS) peak velocity at Earth directly depends on the area of the coronal hole (CH) on the Sun. Different degrees of association be…
How the area of solar coronal holes affects the properties of high-speed solar wind streams near Earth -- An analytical model
Stefan Johann Hofmeister, Eleanna Asvestari, Jingnan Guo +10
We derive a simple analytical model for the propagation of HSSs from the Sun to Earth and thereby show how the area of coronal holes and the size of their boundary regions affect t…
Identification of Coronal Holes on AIA/SDO images using unsupervised Machine Learning
Fadil Inceoglu, Yuri Y. Shprits, Stephan G. Heinemann +1
Through its magnetic activity, the Sun governs the conditions in Earth's vicinity, creating space weather events, which have drastic effects on our space- and ground-based technolo…
Validation scheme for solar coronal models -- constraints from multi-perspective observations in EUV and white-light
A. Wagner, E. Asvestari, M. Temmer +2
Context: In this paper we present a validation scheme to investigate the quality of coronal magnetic field models, which is based upon comparisons with observational data from mult…
How to Estimate the Far-Side Open Flux using STEREO Coronal Holes
Stephan G. Heinemann, Manuela Temmer, Stefan J. Hofmeister +3
Global magnetic field models use as input synoptic data, which usually show "aging effects" as the longitudinal 360° information is not obtained simultaneously. Especially during t…
Multi-channel coronal hole detection with convolutional neural networks
R. Jarolim, A. M. Veronig, S. Hofmeister +4
We develop a reliable, fully automatic method for the detection of coronal holes, that provides consistent full-disk segmentation maps over the full solar cycle and can perform in…