Results 131 to 140 of about 881 (218)

Magnetohydrodynamic Poynting Flux Vortices in the Solar Atmosphere and Their Role in Concentrating Energy

The Astrophysical Journal
The nature of energy generation, transport, and effective dissipation responsible for maintaining a hot solar upper atmosphere is still elusive. The Poynting flux is a vital parameter for describing the direction and magnitude of the energy flow, which ...
Suzana S. A. Silva, Gary Verth, Erico L. Rempel, Istvan Ballai, Shahin Jafarzadeh, Viktor Fedun   +5 more
doaj   +1 more source

Temporal Evolution of a Network Jet’s Physical Properties Inferred from FISS/GST and IRIS Observations

The Astrophysical Journal
Small-scale jets, such as chromospheric and transition region (TR) network jets, are of great interest regarding coronal heating and solar wind acceleration. Spectroscopic analysis based on multiple spectral lines with different formation temperatures is
Eun-Kyung Lim, Jongchul Chae, Kyuhyoun Cho, Vasyl Yurchyshyn, Heesu Yang, Kyung-Suk Cho, Hannah Kwak, Donguk Song, Maria S. Madjarska   +8 more
doaj   +1 more source

How Are the Abnormally Hot Chromosphere and Corona Heated by the Solar Magnetic Fields?

The Astrophysical Journal
Abstract The corona is a structure possessed by stars, including the Sun. The abnormal heating of the solar corona and chromosphere is one of the greatest mysteries in modern astronomy. While state-of-the-art observations have identified some candidates of magnetic activity events that could be responsible for this abnormal heating, and ...
K. J. Li, J. C. Xu, W. Feng, J. L. Xie, X. J. Shi, L. H. Deng   +5 more
openaire   +3 more sources

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

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

Enhanced Three-minute Oscillation above a Sunspot during a Solar Flare

The Astrophysical Journal
Three-minute oscillations are a common phenomenon in the solar chromosphere above a sunspot. Oscillations can be affected by the energy release process related to solar flares. In this paper, we report on an enhanced oscillation in flare event SOL2012-07-
Ya Wang, Lyndsay Fletcher, Sargam Mulay, Haisheng Ji, Wenda Cao   +4 more
doaj   +1 more source

Early Chromospheric Response During a Solar Microflare Observed with SOHO's CDS and RHESSI

, 2010
We observed a solar microflare with RHESSI and SOHO's Coronal Diagnostic Spectrometer (CDS) on 2009 July 5. With CDS we obtained rapid cadence (7 s) stare spectra within a narrow field of view toward the center of AR 11024.
Brosius, Jeffrey W., Holman, Gordon D.
core  

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

Propagating Bright Knots in the Chromospheric Fibrils

The Astrophysical Journal
The solar chromosphere is a crucial layer for resolving the problem of atmospheric heating. There are many bright features, which are considered as the thermal signals for heating the atmosphere, and these features are suggested to have resulted from ...
Shaoxuan Tong, Jun Zhang, Tao Ding
doaj   +1 more source

Filamentary Electron-beam Heating in Solar Flares

The Astrophysical Journal
Radiation-hydrodynamic simulations of the solar-flare chromospheric emission very often lead to an excess of the line intensities when compared to observations.
Michalina Litwicka, Petr Heinzel, Jana Kašparová   +2 more
doaj   +1 more source