Results 41 to 50 of about 1,455,996 (195)
Fast Magnetic Wave Could Heat the Solar Low-beta Chromosphere [PDF]
The Astrophysical Journal Letters, 2021 Abstract Magnetohydrodynamic (MHD) waves are candidates for heating the solar chromosphere, although it is still unclear which mode of the wave is dominant in heating. We perform two-dimensional radiative MHD simulation to investigate the propagation of MHD waves in the quiet region of the solar chromosphere.
Yikang Wang +2 more
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Approximations for radiative cooling and heating in the solar chromosphere [PDF]
Astronomy & Astrophysics, 2012 accepted for publication in Astronomy & ...
Carlsson, M., Leenaarts, J.
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Chromospheric Downflows as a Diagnostic of Solar Flare Heating [PDF]
International Astronomical Union Colloquium, 1989 AbstractUsing coordinated X-ray and Hα observations of five solar flares, we investigate the dynamics of chromospheric condensations formed during chromospheric evaporation. We show that the peak downflow velocity of condensations predicted by simple hydrodynamic compression of the chromosphere is in good agreement with empirical downflow velocities ...
Dominic M. Zarro, Richard C. Canfield
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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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Modelling chromospheric evaporation in response to coronal heating [PDF]
, 2018 This thesis presents a new computationally efficient method for modelling the response of the solar corona to the release of energy. During impulsive heating events, the coronal temperature increases which leads to a downward heat flux into the ...
Johnston, Craig David
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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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Is the Solar Chromosphere Heated by Acoustic Waves? [PDF]
The Astrophysical Journal, 2007 Space observations with TRACE have measured only 10% of the energy flux required to heat the nonmagnetic part of the solar chromosphere and have thereby called into question the theory of chromospheric heating by acoustic waves. To explain the deficit in the measured flux, heating by processes related to the magnetic field and the limited spatial ...
openaire +1 more source
Newly Discovered Source of Turbulence and Heating in the Solar Chromosphere [PDF]
The Astrophysical Journal Letters, 2020 Abstract Above the Sun’s luminous photosphere lies the solar chromosphere, where the temperature increases from below 4000 K to over 1 million K. Though physicists do not understand the origin of these increases, they know it powers the solar wind with enormous consequences for the entire solar system.
Meers Oppenheim +3 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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Solar Chromospheric Heating by Kinetic Alfvén Waves Based on the Three-fluid Model
The Astrophysical JournalThe heating mechanism of the solar chromosphere with a partially ionized plasma has been one of the challenging problems in solar physics. Kinetic Alfvén waves (KAWs) have been applied by many authors to study the heating of the corona and chromosphere ...
Jin-Run Ou +3 more
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