Results 121 to 130 of about 5,669 (225)

Magnetic Field Stratification in Active-region Plage from Ca ii K and Ca ii 8542 Å Spectropolarimetry

The Astrophysical Journal Letters
We investigate the height variation of the line-of-sight (LOS) magnetic field in solar active-region (AR) plage from the upper photosphere to the upper chromosphere using cospatial ultraviolet and infrared spectropolarimetric observations from the ...
Iñigo Juanikorena Berasategi, Ernest Alsina Ballester, Javier Trujillo Bueno, Francisco A. Iglesias, Yusuke Kawabata, Juan Sebastián Castellanos Durán, Masahito Kubo, Alex Feller, Yukio Katsukawa, Sami K. Solanki, Jose Carlos del Toro Iniesta, Andreas Lagg, Achim Gandorfer, Pietro Bernasconi, Thomas Berkefeld, Tino L. Riethmüller, Yoshihiro Naito, Alberto Álvarez-Herrero, H. N. Smitha, David Orozco Suárez, Bianca Grauf, Michael Carpenter, Alexander Bell, Valentín Martínez Pillet, Francisco Javier Bailén, Julian Blanco Rodríguez, Edvarda Harnes, Johannes Hölken, Ryohtaroh T. Ishikawa, Takuma Matsumoto, Takayoshi Oba, Azaymi L. Siu-Tapia, Hanna Strecker, Dušan Vukadinovic   +33 more
doaj   +1 more source

The role and contribution of magnetic fields, characterized via their magnetic flux, to the statistical structuring of the solar atmosphere. [PDF]

Sci Rep, 2022
Li KJ, Xu JC, Feng W.
europepmc   +1 more source

Measuring the magnetic fields in the chromospheres of low-mass stars. [PDF]

Nat Commun
Cang T, Petit P, Donati JF, Tian H, Fu J, Li H, Bellotti S, Hu X, Ma X, Lopez Ariste A, Xing K, Morin J, Lu H, Zong W.   +13 more
europepmc   +2 more sources

Editorial: Study of long-term solar datasets: exploring spatio-temporal patterns of solar variability on different time scales and implications in space weather

Frontiers in Astronomy and Space Sciences, 2023
Subhamoy Chatterjee, Dipankar Banerjee, Mausumi Dikpati   +2 more
doaj   +1 more source

Constraints on Acoustic Wave Energy Fluxes and Radiative Losses in the Solar Chromosphere from Non-LTE Inversions

The Astrophysical Journal
Accurately assessing the balance between acoustic wave energy fluxes and radiative losses is critical for understanding how the solar chromosphere is thermally regulated.
J. M. da Silva Santos, M. Molnar, I. Milić, M. Rempel, K. Reardon, J. de la Cruz Rodríguez   +5 more
doaj   +1 more source

Magnetic Fields beneath Active Region Coronal Loops

The Astrophysical Journal
We examine the hypothesis that multipolar magnetic fields advected by photospheric granules can contribute to heating the active chromosphere and corona.
Philip G. Judge, L. Kleint, C. Kuckein
doaj   +1 more source

Vortex Motions in the Solar Atmosphere: Definitions, Theory, Observations, and Modelling. [PDF]

Space Sci Rev, 2023
Tziotziou K, Scullion E, Shelyag S, Steiner O, Khomenko E, Tsiropoula G, Canivete Cuissa JR, Wedemeyer S, Kontogiannis I, Yadav N, Kitiashvili IN, Skirvin SJ, Dakanalis I, Kosovichev AG, Fedun V.   +14 more
europepmc   +1 more source

Determining the Magnetic Field of Active Region Plages Using the Whole CLASP2/2.1 Spectral Window

The Astrophysical Journal
The Chromospheric LAyer SpectroPolarimeter missions, CLASP2 and CLASP2.1, demonstrated that the near-UV spectral region between 279.30 and 280.68 nm is suitable for studying the magnetism of the solar chromosphere.
David Afonso Delgado, Tanausú del Pino Alemán, Javier Trujillo Bueno, Ryohko Ishikawa, Ernest Alsina Ballester, David E. McKenzie, Luca Belluzzi, Christian Bethge, Ken Kobayashi, Takenori J. Okamoto, Laurel A. Rachmeler, Donguk Song, Jiří Štěpán, Bart de Pontieu, Adam R. Kobelski, Genevieve D. Vigil, Frédéric Auchère, Ryouhei Kano, Amy Winebarger   +18 more
doaj   +1 more source

Simulations of Magnetohydrodynamics and CO Formation from the Convection Zone to the Chromosphere

, 2020
We present the results of simulations of the formation and the evolution of carbon monoxide (CO) and of magnetic fields in the solar atmosphere, extending from the upper convection zone to the middle chromosphere.
Sven Wedemeyer-Böhm, Oskar Steiner, Matthias Steffen, Bernd Freytag, Inga Kamp, Werner Schaffenberger   +5 more
core  

Transverse oscillations and an energy source in a strongly magnetized sunspot. [PDF]

Nat Astron, 2023
Yuan D, Fu L, Cao W, Kuźma B, Geeraerts M, Trelles Arjona JC, Murawski K, Van Doorsselaere T, Srivastava AK, Miao Y, Feng S, Feng X, Noda CQ, Cobo BR, Su J.   +14 more
europepmc   +1 more source