Results 71 to 80 of about 14,687 (203)

The Plasma β in Quiet Sun Regions: Multi-instrument View

The Astrophysical Journal
A joint campaign of several spaceborne and ground-based observatories, such as the GREGOR solar telescope, the Extreme-ultraviolet Imaging Spectrometer (EIS), and the Interface Region Imaging Spectrograph (Hinode Observing Plan 381, 2019 October 11–22 ...
Jenny M. Rodríguez-Gómez, Christoph Kuckein, Sergio J. González Manrique, Jonas Saqri, Astrid Veronig, Peter Gömöry, Tatiana Podladchikova   +6 more
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Structuring of the quiet solar corona [PDF]

Die Aufheizung der Sonnenkorona, der dünnen äußeren Atmosphäre der Sonne, ist seit Jahrzehnten eine der wichtigsten offenen Fragen der Sonnenphysik. Wie das koronale Plasma oberhalb der viel kühleren Photosphäre Millionen von Grad erreicht, hängt eng mit dem Magnetfeld der Sonne zusammen. Das Feld durchdringt die Sonnenatmosphäre und prägt verschiedene
openaire   +1 more source

Estimating the contribution of Alfvén waves to the process of heating the quiet solar corona [PDF]

Monthly Notices of the Royal Astronomical Society, 2015
We solve numerically the ideal MHD equations with an external gravitational field in 2D in order to study the effects of impulsively generated linear and non-linear Alfv n waves into isolated solar arcades and coronal funnels. We analyze the region containing the interface between the photosphere and the corona.
Gonzalez-Aviles, J. J., Guzman, F. S.
openaire   +2 more sources

Kinetic Modeling of Inertial Alfvén Waves in the Solar Corona: Implications for Heating and Particle Acceleration

Journal of Geophysical Research: Space Physics, Volume 131, Issue 1, January 2026.
Abstract Recent observations from Parker Solar Probe and Solar Orbiter highlight the importance of Alfvén waves in solar coronal heating and particle acceleration. In this study, we investigate inertial Alfvén waves (IAWs), which operate at electron inertial scales, as a potential mechanism for plasma heating and charged particle acceleration in the ...
S. Ayaz, Gary P. Zank, Imran A. Khan, Andreas Shalchi, L.‐L. Zhao, Yeimy J. Rivera   +5 more
wiley   +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
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Thermal structuring of the quiet solar corona

Astronomy & Astrophysics
Context. The quiet solar atmosphere is populated with plasma loops that are typically observed in the ultraviolet (UV) and extreme-ultraviolet (EUV) wavelengths. The coronal counterparts of these loops are traditionally referred to as coronal bright points.
N. Milanović, H. Peter, L. P. Chitta, P. R. Young   +3 more
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The Chinese Radio Telescope Array for Interplanetary Scintillation Monitoring

Space Weather, Volume 24, Issue 1, January 2026.
Abstract Solar flares, coronal mass ejections (CMEs) and enegertic particles, etc., are the driving sources that may cause catastrophic space weathers. It is desirable to obtain information of solar eruptions like flares and CMEs, etc., propagating from the Sun to the near‐Earth space.
Yihua Yan, Wei Wang, Jin Fan, Ming Xiong, Zhijun Chen, Linjie Chen, Cang Su, Sha Li, Jun Cheng, Jing Du, Xueshang Feng   +10 more
wiley   +1 more source

Deciphering the birth region, formation, and evolution of ambient and transient solar wind using heavy ion observations

Frontiers in Astronomy and Space Sciences, 2022
This paper outlines key scientific topics that are important for the development of solar system physics and how observations of heavy ion composition can address them.
Yeimy. J. Rivera, Aleida Higginson, Susan T. Lepri, Nicholeen M. Viall, B. L. Alterman, Enrico Landi, Sarah A. Spitzer, Jim M. Raines, Steven R. Cranmer, John M. Laming, Emily I. Mason, Samantha Wallace, John C. Raymond, Benjamin J. Lynch, Chris R. Gilly, Thomas Y. Chen, Ryan M. Dewey   +16 more
doaj   +1 more source

A Comparison of MAVEN SIR Observations With the Stationary WSA‐ENLIL Solar Wind Model

Journal of Geophysical Research: Space Physics, Volume 130, Issue 12, December 2025.
Abstract Predicting times of arrival and properties of space weather events, such as coronal mass ejections and stream interaction regions (SIRs), has become an important focus of the space physics community within recent years. Extensive efforts have been undertaken to model these space weather events throughout the heliosphere in order to better ...
Sarah Henderson, Rachael Filwett, Sophia Owen, Jasper Halekas, Jacob Gruesbeck   +4 more
wiley   +1 more source

On the Million-degree Signature of Spicules

The Astrophysical Journal Letters
Spicules have often been proposed as substantial contributors toward the mass and energy balance of the solar corona. While their transition region (TR) counterpart has unequivocally been established over the past decade, the observations concerning the ...
Souvik Bose, Jayant Joshi, Paola Testa, Bart De Pontieu   +3 more
doaj   +1 more source