Results 121 to 130 of about 860 (219)

High-resolution observations of the solar photosphere, chromosphere, and transition region: A database of coordinated IRIS and SST observations

, 2020
NASA’s Interface Region Imaging Spectrograph (IRIS) provides high-resolution observations of the solar atmosphere through ultraviolet spectroscopy and imaging.
Skogsrud, Håkon, Kleint, Lucia, Martinez-Sykora, Juan, Rouppe van der Voort, Luc, Woods, M. M., Gošić, Milan, Sainz Dalda, Alberto, Ortiz, Ada, Carlsson, Mats, Zacharias, Pia, Graham, David R., Joshi, Jayant, Nóbrega Siverio, Daniel Elias, Bose, Souvik, Drews, Ainar, Kohutova, Petra, Szydlarski, Mikolaj Marcin, Quintero Noda, Carlos, De Pontieu, Bart Walter, Leifsen, Torben, de la Cruz Rodriguez, Jaime, Froment, Clara, Scharmer, Göran B., Popovas, Andrius, Timmons, R., Scullion, Eamon, Vissers, Gregal Joan Maria, Mendes Domingos Pereira, Tiago, Jafarzadeh, Shahin, Chintzoglou, Georgios, de Jorge Henriques, Vasco Manuel, Hansteen, Viggo, Schmit, Donald   +32 more
core   +1 more source

The Ubiquity of Twisted Flux Ropes in the Quiet Sun

The Astrophysical Journal Letters
Models and observations have demonstrated that twisted flux ropes (TFRs) play a significant role in the structure and eruptive dynamics of active regions.
Tahar Amari, Aurélien Canou, Marco Velli, Zoran Mikic, Frederic Alauzet, Eric Buchlin, Jean-François Luciani, Jean-Jacques Aly, Lucas A. Tarr   +8 more
doaj   +1 more source

Investigating magnetic fields in the solar chromosphere [Elektronisk resurs]

, 2020
Solar plage has been the topic of many studies since its initial description in the mid 19th century, but as of yet it has not been understood to the point where we can reproduce all aspects of these active regions in quasi-realistic numerical models. To
Kochukhov, Oleg,, de la Cruz Rodr´ıguez, Jaime,, Kiselman, Dan,, Pietrow, Alexander,   +3 more
core  

Magneto-seismological insights into the penumbral chromosphere and evidence for wave damping in spicules

, 2014
Aims: The observation of propagating magneto-hydrodynamic kink waves in magnetic structures and measurement of their properties (amplitude, phase speed) can be used to diagnose the plasma conditions in the neighbourhood of the magnetic structure via ...
Morton, Richard, R. J. Morton
core   +1 more source

Transition Region Brightening in a Moss Region and Their Relation with Lower Atmospheric Dynamics

The Astrophysical Journal
Small-scale brightenings (SBs) are commonly observed in the transition region (TR) that separates the solar chromosphere from the corona. These brightenings, omnipresent in active region patches known as “moss” regions, could potentially contribute to ...
Bhinva Ram, Tanmoy Samanta, Yajie Chen, Alphonse C. Sterling, Jayant Joshi, Vasyl Yurchyshyn, Lakshmi Pradeep Chitta, Vaibhav Pant   +7 more
doaj   +1 more source

Searching for Evidence of Subchromospheric Magnetic Reconnection on the Sun

The Astrophysical Journal
Within the coronae of stars, abundances of those elements with low first ionization potential (FIP) often differ from their photospheric values. The coronae of the Sun and solar-type stars mostly show enhancements of low-FIP elements (the FIP effect ...
D. Baker, L. van Driel-Gesztelyi, A. W. James, P. Démoulin, A. S. H. To, M. Murabito, D. M. Long, D. H. Brooks, J. McKevitt, J. M. Laming, L. M. Green, S. L. Yardley, G. Valori, T. Mihailescu, S. A. Matthews, H. Kuniyoshi   +15 more
doaj   +1 more source

A First Comparison of Millimeter Continuum and Mg II Ultraviolet Line Emission from the Solar Chromosphere

, 2017
We present joint observations of the Sun by the Atacama Large Millimeter/submillimeter Array (ALMA) and the Interface Region Imaging Spectrograph (IRIS). Both millimeter/submillimeter-λ continuum emission and ultraviolet (UV) line emission originate from
Leenaarts, J., De Pontieu, Bart Walter, Shimojo, M., Bastian, T., G. Chintzoglou, Bastian, T. S., J. Leenaarts, D. Schmit, De Pontieu, B., Chintzoglou, G., Leenaarts, Jorrit, Loukitcheva, M., Schmit, D., M. Loukitcheva, Leenaarts, Jorrit,, T. S. Bastian, B. De Pontieu, M. Shimojo   +17 more
core   +1 more source

87th Annual Meeting of the Meteoritical Society 2025: Abstracts

Meteoritics &Planetary Science, Volume 60, Issue S1, Page 30-350, August 2025.
wiley   +1 more source

Hinode/EIS plasma diagnostics in the flaring solar chromosphere

, 2011
Context: The impulsive phase of solar flares is a time of rapid energy deposition and heating in the lower solar atmosphere, leading to changes in the temperature, density, ionisation and velocity structure of this region.
I. G. Hannah, Graham, D.R., Fletcher, L., L. Fletcher, D. R. Graham, Hannah, I.G.   +5 more
core   +1 more source

Mystery behind the Peeling of a Filament and the Associated Sudden Disappearance of a Sunspot Penumbra

The Astrophysical Journal Letters
On 2024 July 25, while observing the solar active region NOAA 13762 with the high-resolution 1.6 m Goode Solar Telescope at the Big Bear Solar Observatory, we witnessed two mysterious phenomena: the partial detachment of filament strands from its main ...
Ju Jing, Mia Mancuso, Satoshi Inoue, Jeongwoo Lee, Qin Li, Wen He, Yan Xu, Wenda Cao, Haimin Wang   +8 more
doaj   +1 more source