Results 1 to 10 of about 307 (116)
Evidence of ubiquitous Alfvén pulses transporting energy from the photosphere to the upper chromosphere [PDF]
Nature Communications, 2019 Heating of the upper solar atmospheric layers is an open question. Here, the authors show observational evidence that ubiquitous Alfven pulses are excited by prevalent photospheric swirls, which are found to propagate upwards and carry enough energy flux
Jiajia Liu +4 more
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The Astrophysical JournalA proposed mechanism for solar chromospheric heating is magnetohydrodynamic waves propagating upward along magnetic field lines and dissipating their energy in the chromosphere.
Mayu Koyama, Toshifumi Shimizu
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The Astrophysical Journal, 2023 High-resolution spectral observations of the lower solar atmosphere (chromosphere and transition region) during coronal heating events, in combination with predictions from models of impulsively heated loops, provide powerful diagnostics of the ...
Paola Testa +3 more
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Phase Mixing of Propagating Alfvén Waves in a Single-fluid Partially Ionized Solar Plasma
The Astrophysical Journal, 2023 The phase mixing of Alfvén waves is one of the most promising mechanisms for the heating of the solar atmosphere. The damping of waves in this case requires small transversal scales, relative to the magnetic field direction; this requirement is achieved ...
M. McMurdo +4 more
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Astronomy & AstrophysicsContext. The solar chromosphere is a dynamic and crucial interface between the solar interior and its interplanetary environment, regulating how energy is locally deposited into heat and transported into the upper atmospheric layers.
Noraz Q., Carlsson M., Aulanier G.
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Constraining the Systematics of (Acoustic) Wave Heating Estimates in the Solar Chromosphere
The Astrophysical Journal, 2023 Acoustic wave heating is believed to contribute significantly to the missing energy input required to maintain the solar chromosphere in its observed state.
Momchil E. Molnar +4 more
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Solar Atmospheric Heating Due to Small-scale Events in an Emerging Flux Region
The Astrophysical Journal, 2023 We investigate the thermal, kinematic, and magnetic structure of small-scale heating events in an emerging flux region (EFR). We use high-resolution multiline observations (including Ca ii 8542 Å, Ca ii K, and the Fe i 6301 Å line pair) of an EFR located
Rahul Yadav +4 more
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Spectral signatures of bright grains determine chromospheric heating
Astronomy & AstrophysicsChromospheric heating is an important ingredient in the energy budget of the solar atmosphere. Quantifying chromospheric heating from observations is a challenging task because spectral observations suffer from non-LTE effects, and heating events may ...
Udnæs Elias R., Pereira Tiago M. D.
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Quantifying Poynting Flux in the Quiet Sun Photosphere
The Astrophysical Journal, 2023 Poynting flux is the flux of magnetic energy, which is responsible for chromospheric and coronal heating in the solar atmosphere. It is defined as a cross product of the electric and magnetic fields, and in ideal MHD conditions it can be expressed in ...
Dennis Tilipman +5 more
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Astronomy & AstrophysicsContext. The physical mechanisms of helium abundance (AHe) depletion in the corona and solar wind are closely linked to coronal heating, solar wind origin, and acceleration processes. The relationships between the AHe in the solar wind and the properties
Ma Chi +5 more
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