Results 91 to 100 of about 881 (218)

Chromospheric heating by the Farley-Buneman instability

, 2008
Context.Chromospheric heating produces UV emissions that can only occur in an enhanced electron temperature medium. In the quiet Sun the radiative losses are orders of magnitude larger than those in the much hotter corona.
W. K. Peterson, J. M. Fontenla, J. Harder   +2 more
core   +1 more source

Chromospheric emission from nanoflare heating in RADYN simulations

, 2022
Context. Heating signatures from small-scale magnetic reconnection events in the solar atmosphere have proven to be difficult to detect through observations. Numerical models that reproduce flaring conditions are essential in understanding how nanoflares
De Pontieu, Bart Walter, Rouppe van der Voort, Luc, Bakke, Helle, Testa, Paola, P. Testa, Polito, V., L. Rouppe van der Voort, Carlsson, Mats, H. Bakke, V. Polito, M. Carlsson, B. V. Gudiksen, B. De Pontieu, Gudiksen, Boris Vilhelm   +13 more
core   +1 more source

Propagation and damping of MHD waves in the solar atmosphere

, 2015
Quasi-periodic disturbances have been observed in the outer solar atmosphere for many years. Although first interpreted as upflows (Schrijver et al.
Kiddie, Greg
core  

Reduction of the Downward Energy Flux of Nonthermal Electrons in the Solar Flare Corona due to Cospatial Return-current Losses

The Astrophysical Journal
High-energy electrons carry much of a solar flare’s energy. Therefore, understanding changes in electron beam distributions during their propagation is crucial. A key focus of this paper is how the cospatial return current reduces the energy flux carried
Meriem Alaoui, Gordon D. Holman, M. Swisdak   +2 more
doaj   +1 more source

Forward modeling solar spectra onto Doppler images of λ And

Astronomy & Astrophysics
Context. Due to their high chromospheric activity and photometric variability, RS CVn-type binaries are ideal laboratories for studying stellar surface structures and the corresponding stellar activity relations.
Adebali Ö., Pietrow A. G. M.
doaj   +1 more source

Wave Heating of the Solar Chromosphere

, 2022
The solar chromosphere is well known to be in a radiative balance that requires an unac- counted source of heating. In this thesis I present observational constraints on the wave energy flux in the solar chromosphere, which is one of the favored ...
Molnar, Momchil Emil
core   +1 more source

On the Intermittency of Hot Plasma Loops in the Solar Corona

The Astrophysical Journal
A recent analysis has suggested that the heating of plasma loops in the solar corona depends not just on the Poynting flux but also on processes yet to be identified.
Philip G. Judge, N. Paul M. Kuin
doaj   +1 more source

Chromospheric waves and their contribution to heating of the atmosphere

, 2022
Acoustic and magnetoacoustic waves play an important role in the chromospheric heating, exhibiting the capability of depositing a main part of their energy in the chromosphere. To study the heating of solar chromospheric magnetic and non-magnetic regions
Abbasvand Azar, Vahid
core  

Ubiquitous Small-scale Extreme-ultraviolet Upflow-like Events above Network Regions Observed by the Solar Orbiter/Extreme Ultraviolet Imager

The Astrophysical Journal
Universal small-scale solar activity in the quiet region is suggested to be a potential source of solar wind and the upper solar atmosphere. Here, with the high-resolution 174 Å imaging observations from the Solar Orbiter/Extreme Ultraviolet Imager, we ...
Yadan Duan, Hechao Chen, Zhenyong Hou, Zheng Sun, Yuandeng Shen   +4 more
doaj   +1 more source

Effect of structuring on coronal loop oscillations

, 2007
In this Thesis the theoretical understanding of oscillations in coronal structures is developed. In particular, coronal loops are modelled as magnetic slabs of plasma.
McEwan, Michael P.
core