Results 61 to 70 of about 14,964 (204)

Detection of a Magnetic Discontinuity in the Upper Solar Chromosphere Associated with a Coronal Loop Brightening Observed by CLASP2.1

The Astrophysical Journal
We report the first detection of a magnetic discontinuity in the upper solar chromosphere associated with a coronal loop brightening. Our findings are based on novel observations obtained by the Chromospheric LAyer SpectroPolarimeter (CLASP2.1 ...
Donguk Song, Ryohko Ishikawa, David E. McKenzie, Javier Trujillo Bueno, Frédéric Auchère, Ryouhei Kano, Amy Winebarger, Takenori J. Okamoto, Laurel A. Rachmeler, Ken Kobayashi, Genevieve D. Vigil, Adam R. Kobelski, Christian Bethge, Eun-Kyung Lim, Luca Belluzzi, Ernest Alsina Ballester, Tanausú del Pino Alemán, Jiří Štěpán   +17 more
doaj   +1 more source

Solar science with the Atacama Large Millimeter/submillimeter Array - A new view of our Sun [PDF]

, 2015
The Atacama Large Millimeter/submillimeter Array (ALMA) is a new powerful tool for observing the Sun at high spatial, temporal, and spectral resolution.
Alissandrakis, C. E., Antolin, P., Ayres, T., Barta, M., Bastian, T., Benz, A. O., Black, J. H., Brajsa, R., De Pontieu, B., Doyle, J. G., Fleck, B., Fleishman, G., Gary, D., Gunar, S., Hauschildt, P., Heinzel, P., Hudson, H., Karlicky, M., Kato, Y., Kontar, E. P., Labrosse, N., Loukitcheva, M., Ludwig, H. -G., Nakariakov, V. M., Nindos, A., Perez, E., Scullion, E., Selhorst, C. L., Shimojo, M., Solanki, S. K., Soler, R., Tiwari, S. K., van der Voort, L. Rouppe, Van Doorsselaere, T., Wedemeyer, S., White, S. M., Yagoubov, P., Zaqarashvili, T.   +37 more
core   +2 more sources

Dominant Trends in Jupiter's H3+ ${\mathbf{H}}_{\mathbf{3}}^{\mathbf{+}}$ Northern Aurora: II. Magnetospheric Mapping

Journal of Geophysical Research: Space Physics, Volume 130, Issue 10, October 2025.
Abstract Jupiter's auroral regions have previously been defined by broad‐scale auroral structures, but these are typically obscured by the wide array of temporal variability observed at timescales between minutes and days, making it difficult to understand the underlying magnetospheric biases driving these brightness differences.
Tom S. Stallard, Katie L. Knowles, Henrik Melin, Ruoyan Wang, Emma M. Thomas, Luke Moore, James O’Donoghue, Rosie E. Johnson, Steve Miller, John C. Coxon   +9 more
wiley   +1 more source

Comparison of Solar Imaging Feature Extraction Methods in the Context of Space Weather Prediction With Deep Learning‐Based Models

Journal of Geophysical Research: Machine Learning and Computation, Volume 2, Issue 3, September 2025.
Abstract Recently, many machine learning‐based models have been developed to predict geomagnetic activity several days in advance directly from space‐borne solar imaging. To better understand and improve these models, we compare dimensionality reduction techniques to extract abstract features from solar images for space weather‐related downstream tasks.
Maria Tahtouh, Guillerme Bernoux, Antoine Brunet, Denis Standarovski, Gautier Nguyen, Angélica Sicard   +5 more
wiley   +1 more source

Propagating and Stationary Bright Knots in the Quiet Sun

The Astrophysical Journal Letters, 2022
The question of what heats the solar chromosphere and corona remains one of the most important puzzles in solar physics and astrophysics. Up to now, two mechanisms are considered to work in heating the chromosphere and corona: magnetic reconnection and ...
Jun Zhang, Yijun Hou, Yue Fang, Feng Chen, Ting Li, Xiaoli Yan, Tao Ding, Zhiping Song, Yongyuan Xiang, Zhong Liu   +9 more
doaj   +1 more source

Deriving the Coronal Separatrix‐Web With the WSA Model

Journal of Geophysical Research: Space Physics, Volume 130, Issue 8, August 2025.
Abstract We demonstrate a new capability of the Wang‐Sheeley‐Arge (WSA) model to routinely derive the coronal separatrix web (S‐web) as a standard data product. We describe our methodology for deriving the squashing factor (Q $Q$) and we use Carrington rotation (CR) 2109 to illustrate the validation of our output with that derived from the POT3D model.
Samantha Wallace, Aleida K. Higginson, David G. Simpson, Nicholeen M. Viall, Peter Wyper, C. Nick Arge   +5 more
wiley   +1 more source

The connection of Type II Spicules to the Corona

, 2012
We examine the hypothesis that plasma associated with "Type II" spicules is heated to coronal temperatures, and that the upward moving hot plasma constitutes a significant mass supply to the solar corona.
Arnaud, Aschwanden, Bart de Pontieu, Beckers, de Pontieu, de Pontieu, Hansteen, Jordan, Judge, Judge, Judge, Kosovare Olluri, Landi, Mariska, Martínez-Sykora, McIntosh, Miyamoto, Parker, Philip G. Judge, Pietarila, Pinfield, Rouppe van der Voort, Scott W. McIntosh, Seaton   +23 more
core   +1 more source

BOSS Ultracool Dwarfs I: Colors and Magnetic Activity of M and L dwarfs [PDF]

, 2014
We present the colors and activity of ultracool (M7-L8) dwarfs from the Tenth Data Release of the Sloan Digital Sky Survey (SDSS). We combine previous samples of SDSS M and L dwarfs with new data obtained from the Baryon Oscillation Sky Survey (BOSS) to ...
Bochanski, John J., Davenport, James R. A., Ge, Jian, Hawley, Suzanne L., Schmidt, Sarah J., Schneider, Donald P., West, Andrew A.   +6 more
core   +3 more sources

Commission 11. (Chromospheric Phenomena.) [PDF]

Transactions of the International Astronomical Union, 1936
Le Président évoque la mémoire du Dr C. E. Saint John, décédé peu de temps avant le Congrès et qui, alors qu’il présidait la Commission groupant toutes les recherches de Physique solaire, portait un intérêt très vif aux travaux dont s’occupe maintenant la Commission n.Deux demandes de subventions ont été soumises à la Commission: l’une, de M.
L. D’Azambuja, H. W. Newton
openaire   +2 more sources

Solar Wind Heavy Ions and Alpha Particles Within Earth's Magnetosphere and Their Variability With Upstream Conditions

Journal of Geophysical Research: Space Physics, Volume 130, Issue 8, August 2025.
Abstract Working toward the goal of understanding solar wind (SW) entry to the Earth's magnetosphere, this study examines solar‐origin ion composition in the magnetotail. During its trajectory, Wind spent a significant amount of time in the Earth's magnetotail, where its SupraThermal Ion Composition Spectrometer (STICS) measured the mass and mass per ...
S. Colón‐Rodríguez, M. W. Liemohn, J. M. Raines, S. T. Lepri   +3 more
wiley   +1 more source