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Potential Solar Precursors to Magnetic Switchbacks
Durgesh Tripathi, Maria S. Madjarska, Judy Karpen +9
The origin of magnetic switchbacks-large-amplitude, spherically polarized magnetic-field fluctuations with local polarity inversions shown to be nearly ubiquitous in the inner heli…
Magnetic switchback formation: a review of proposed mechanisms
Peter F. Wyper, Jonathan Squire, Etienne Pariat +19
Magnetic switchbacks are large amplitude deflections of the magnetic field within the solar wind. They are Alfvénic in character and so are associated with a spike in velocity and…
Statistics of blob properties in two types of coronal streamers
Haiyi Li, Zhenghua Huang, Maria S. Madjarska +4
Previous studies have shown that a streamer blob might originate in the lower corona and thus be affected by activity in that region. While the base of one streamer might differ fr…
Statistics of transition-region loop brightenings and their heating implication
Xiuhui Zuo, Zhenghua Huang, Maria S. Madjarska +4
Transition-region loops are a type of critical magnetic structure in the solar atmosphere, yet their physical properties and evolutionary characteristics remain statistically poorl…
Structures and properties of fan-shaped jets: H dark blobs and transparent regions
Heesu Yang, Maria S. Madjarska, EunKyung Lim +2
We investigated three fan-shaped jets observed above sunspot light bridges or nearby sunspot regions. The study aimed to explore the dynamics and physical properties of jets' featu…
Challan: Solar Full-disk Imaging-Spectroscopic Telescope using the Drift-Scanning Technique
Heesu Yang, Maria S. Madjarska, Donguk Song +7
The Challan instrument is a solar full-disk imaging spectroscopic telescope planned to be installed at three sites with a 120-degree longitudinal difference, enabling continuous 24…
Radio dimming associated with filament eruptions in the meter and decimeter wavebands
Zhenyong Hou, Hui Tian, Jingye Yan +12
Filament eruptions are considered to be a common phenomenon on the Sun and other stars, yet they are rarely directly imaged in the meter and decimeter wavebands. Using imaging data…
Tracing magnetic switchbacks to their source: An assessment of solar coronal jets as switchback precursors
Nina Bizien, Clara Froment, Maria S. Madjarska +2
The origin of large-amplitude magnetic field deflections in the solar wind, known as magnetic switchbacks, is still under debate. These structures, which are ubiquitous in the obse…
Coronal magnetic field and emission properties of small-scale bright and faint loops in the quiet Sun
Maria S. Madjarska, Thomas Wiegelmann, Pascal Démoulin +1
The present study provides statistical information on the coronal magnetic field and intensity properties of small-scale bright and faint loops in the quiet Sun. We aim to quantita…
Large-amplitude transverse MHD waves prevailing in the H chromosphere of a solar quiet region revealed by MiHI integrated field spectral observations
Jongchul Chae, Michiel van Noort, Maria S. Madjarska +3
The investigation of plasma motions in the solar chromosphere is crucial for understanding the transport of mechanical energy from the interior of the Sun to the outer atmosphere a…
Numerous Bidirectionally Propagating Plasma Blobs near the Reconnection Site of a Solar Eruption
Zhenyong Hou, Hui Tian, Maria S. Madjarska +7
Current sheet is a common structure involved in solar eruptions. However, it is observed in minority of the events and the physical properties of its fine structures during a solar…
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…
Deciphering the solar coronal heating: Energizing small-scale loops through surface convection
D. Nóbrega-Siverio, F. Moreno-Insertis, K Galsgaard +4
The solar atmosphere is filled with clusters of hot small-scale loops commonly known as Coronal Bright Points (CBPs). These ubiquitous structures stand out in the Sun by their stro…
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…
A Type II Radio Burst Driven by a Blowout Jet on the Sun
Zhenyong Hou, Hui Tian, Wei Su +5
Type II radio bursts are often associated with coronal shocks that are typically driven by coronal mass ejections (CMEs) from the Sun. Here, we conduct a case study of a type II ra…
Eruptions from coronal bright points: A spectroscopic view by IRIS of a mini-filament eruption, QSL reconnection, and reconnection-driven outflows
Maria S. Madjarska, Duncan H. Mackay, Klaus Galsgaard +2
The present study investigates a mini-filament eruption associated with cancelling magnetic fluxes. The eruption originates from a small-scale loop complex commonly known as a Coro…
Investigation of the subsurface structure of a sunspot based on the spatial distribution of oscillation centers inferred from umbral flashes
Kyuhyoun Cho, Jongchul Chae, Maria S. Madjarska
The subsurface structure of a solar sunspot is important in the stability of the sunspots and the energy transport therein. Two subsurface structure models have been proposed, the…
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…
On the Nature of Propagating Intensity Disturbances in Polar Plumes during the 2017 Total Solar Eclipse
Kyung-Suk Cho, Il-Hyun Cho, Maria S. Madjarska +8
The propagating intensity disturbances (PIDs) in plumes are still poorly understood and their identity (magnetoacoustic waves or flows) remains an open question. We investigate PID…
The chromospheric component of coronal bright points. Coronal and chromospheric responses to magnetic-flux emergence
Maria S. Madjarska, Jongchul Chae, Fernando Moreno-Insertis +5
We investigate the chromospheric counterpart of small-scale coronal loops constituting a coronal bright point (CBP) and its response to a photospheric magnetic-flux increase accomp…
Detection of Opposite Magnetic Polarity in a Light Bridge: Its Emergence and Cancellation in association with LB Fan-shaped Jets
Eun-Kyung Lim, Heesu Yang, Vasyl Yurchyshyn +3
Light bridges (LBs) are relatively bright structures that divide sunspot umbrae into two or more parts. Chromospheric LBs are known to be associated with various activities includi…
Eruptions from coronal hole bright points: observations and non-potential modelling
Maria S. Madjarska, Klaus Galsgaard, Duncan H. Mackay +2
A single case study of a CBP in an equatorial coronal hole with an exceptionally large size is investigated to extend our understanding of the formation of mini-filaments, their de…
Impulsive wave excitation by rapidly changing granules
Hannah Kwak, Jongchul Chae, Maria S. Madjarska +2
It is not yet fully understood how magnetohydrodynamic waves in the interior and atmosphere of the Sun are excited. Traditionally, turbulent convection in the interior is considere…
Inference of chromospheric plasma parameters on the Sun
Jongchul Chae, Maria S. Madjarska, Hannah Kwak +1
The solar chromosphere can be observed well through strong absorption lines. We infer the physical parameters of chromospheric plasmas from these lines using a multilayer spectral…