96 citations · 931 across the 36 of their papers we have counts for
37 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…
PROSWIN: Probabilistic Solar Wind Speed Forecasting Using Deep Distributional Regression From Solar Images
Daniel Collin, Yuri Shprits, Luca Chiarabini +3
Accurately predicting fast solar wind conditions is challenging, as uncertainties are large and unquantified by traditional single-value prediction models. In particular, the risks…
Coronal mass ejection arrival forecasting with the drag-based assimilation of satellite observations
Zaina Abu-Shaar, Tatiana Podladchikova, Astrid M. Veronig +2
Forecasting the arrival of coronal mass ejections (CMEs) is vital for protecting satellites, power systems, and human spaceflight. We present HELIOPANDA: Heliospheric Observer for…
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…
Forecasting High-Speed Solar Wind Streams from Solar Images
Daniel Collin, Yuri Shprits, Stefan J. Hofmeister +2
The solar wind, a stream of charged particles originating from the Sun and transcending interplanetary space, poses risks to technology and astronauts. In this work, we develop a p…
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…
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…
Geomagnetic storm forecasting from solar coronal holes
Simona Nitti, Tatiana Podladchikova, Stefan J. Hofmeister +3
Coronal holes (CHs) are the source of high-speed streams (HSSs) in the solar wind, whose interaction with the slow solar wind creates corotating interaction regions (CIRs) in the h…
Deriving instrumental point spread functions from partially occulted images
Stefan Johann Hofmeister, Michael Hahn, Daniel Wolf Savin
The point-spread function (PSF) of an imaging system describes the response of the system to a point source. Accurately determining the PSF enables one to correct for the combined…
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…
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…
The Observational Uncertainty of Coronal Hole Boundaries in Automated Detection Schemes
Martin A. Reiss, Karin Muglach, Christian Möstl +16
Coronal holes are the observational manifestation of the solar magnetic field open to the heliosphere and are of pivotal importance for our understanding of the origin and accelera…
Coronal Hole Detection and Open Magnetic Flux
J. A. Linker, S. G. Heinemann, M. Temmer +14
Many scientists use coronal hole (CH) detections to infer open magnetic flux. Detection techniques differ in the areas that they assign as open, and may obtain different values for…
Statistical Approach on Differential EmissionMeasure of Coronal Holes using the CATCH Catalog
Stephan G. Heinemann, Jonas Saqri, Astrid M. Veronig +2
Coronal holes are large-scale structures in the solar atmosphere that feature a reduced temperature and density in comparison to the surrounding quiet Sun and are usually associate…
Deriving CME density from remote sensing data and comparison to in-situ measurements
M. Temmer, L. Holzknecht, M. Dumbovic +8
We determine the 3D geometry and deprojected mass of 29 well-observed coronal mass ejections (CMEs) and their interplanetary counterparts (ICMEs) using combined STEREO-SOHO white-l…
On the Dependency between the Peak Velocity of High-speed Solar Wind Streams near Earth and the Area of Their Solar Source Coronal Holes
Stefan J. Hofmeister, Astrid M. Veronig, Stefaan Poedts +2
The relationship between the peak velocities of high-speed solar wind streams near Earth and the areas of their solar source regions, i.e., coronal holes, has been known since the…
Magnetic Flux Emergence in a Coronal Hole
J. Palacios, D. Utz, S. Hofmeister +13
A joint campaign of various space-borne and ground-based observatories, comprising the Japanese Hinode mission (HOP~338, 20\,--\,30~September 2017), the GREGOR solar telescope, and…
Mitigating flicker noise in high-precision photometry. I -- Characterization of the noise structure, impact on the inferred transit parameters, and predictions for CHEOPS observations
S. Sulis, M. Lendl, S. Hofmeister +4
In photometry, the short-timescale stellar variability ("flicker"), such as that caused by granulation and oscillations, can reach amplitudes comparable to the transit depth of Ear…
Differential Emission Measure Plasma Diagnostics of a Long-Lived Coronal Hole
Jonas Saqri, Astrid M. Veronig, Stephan G. Heinemann +4
We use Solar Dynamics Observatory (SDO)/Atmospheric Imaging Assembly (AIA) data to reconstruct the plasma properties from differential emission measure (DEM) analysis for a previou…