Results 101 to 110 of about 16,769 (212)

Soft X-ray telescope (SXRT) [PDF]

The soft X-ray telescope (SXRT) will provide direct images of the solar corona with spatial resolution of about 1 arcsecond. These images will show the global structure of the corona, the location and area of coronal holes, and the presence of even the ...
Moore, R.
core   +4 more sources

Atmospheric Heating Events Associated with Fine-scale Flux Emergence in Ephemeral Regions

The Astrophysical Journal
Coronal heating has puzzled solar physicists for decades. The question of why the Sun’s upper atmosphere is significantly hotter than its lower atmosphere remains a key mystery.
Hanlin Yang, Jingxiu Wang, Chunlan Jin
doaj   +1 more source

Turbulent Coronal Heating Mechanisms: Coupling of Dynamics and Thermodynamics

, 2012
Context. Photospheric motions shuffle the footpoints of the strong axial magnetic field that threads coronal loops giving rise to turbulent nonlinear dynamics characterized by the continuous formation and dissipation of field-aligned current sheets where
A. F. Rappazzo, Bingert, Dahlburg, Dahlburg, Dahlburg, Dahlburg, Dorch, Einaudi, Einaudi, G. Einaudi, Gudiksen, Hendrix, Hildner, M. Velli, Parker, R. B. Dahlburg, Rappazzo, Rappazzo, Rappazzo, Rappazzo, Reale, Shebalin, Strauss   +22 more
core   +1 more source

Solar Coronal Heating by Gravity-Induced Resonant Emission

, 2019
Solar Coronal Heating is a Nonlinear Quantum Mechanical Phenomenon. Corona is a powerful source of X-rays and ionisations & emissions of such radiations are quantum mechanical and levels are highly unstable to order of femto-seconds. A linear method of energy transfer like collisional ionisation to such levels is practically not feasible.
openaire   +2 more sources

Impact of Solar Irradiance on Storm‐Time Thermospheric Mass Density Response

Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.
Abstract As a key parameter in the externally forced ionosphere–thermosphere (IT) system, mass density response to storms is affected by the prevailing solar irradiance. To better understand this relationship, we examine mass density responses to the same storm but with different background solar irradiance levels.
Simin Zhang, Liying Qian, Nicholas Pedatella, Eric Sutton, Noah Peterson, Thomas Berger   +5 more
wiley   +1 more source

Modeling multiphase plasma in the corona: prominences and rain

Living Reviews in Solar Physics
We review major achievements in our understanding of multiphase coronal plasma, where cool-dense and hot-tenuous matter coexists, brought about by advances in modeling and theory, inspired by observations.
Rony Keppens, Yuhao Zhou, Chun Xia
doaj   +1 more source

3D MHD Simulations of Coronal Loops Heated via Magnetic Braiding. I. Continuous Driving

The Astrophysical Journal
The nature and detailed properties of the heating of the million-degree solar corona are important issues that are still largely unresolved. Nanoflare heating might be dominant in active regions and quiet Sun, although direct signatures of such small ...
G. Cozzo, Paola Testa, J. Martinez-Sykora, F. Reale, P. Pagano, F. Rappazzo, V. Hansteen, B. De Pontieu, A. Petralia, E. Alaimo, F. Fiorentino, F. D’Anca, L. Sciortino, M. Todaro, U. Lo Cicero, M. Barbera   +15 more
doaj   +1 more source

Nanoflare Evidence from Analysis of the X-Ray Variability of an Active Region Observed with Hinode/XRT [PDF]

, 2012
The heating of the solar corona is one of the big questions in astrophysics. Rapid pulses called nanoflares are among the best candidate mechanisms.
Kano, R., Klimchuk, J. A., Miceli, M., Reale, F., Terzo, S., Tsuneta, S.   +5 more
core   +1 more source

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

The Astrophysical Journal
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.
K. J. Li, J. C. Xu, W. Feng, J. L. Xie, X. J. Shi, L. H. Deng   +5 more
doaj   +1 more source

Generation of Surface Sausage Oscillations of a Current Sheet and Propagating Magnetoacoustic Waves by Impulsive Reconnection

The Astrophysical Journal
Magnetic reconnection and magnetohydrodynamic waves may well be both playing a role in coronal heating. In this paper, we simulate reconnection in the corona as a response to the convergence of opposite-polarity magnetic sources at the base of the corona.
Sripan Mondal, A. K. Srivastava, David I. Pontin, Eric R. Priest   +3 more
doaj   +1 more source