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Formation of Solar Filaments by Steady and Nonsteady Chromospheric Heating [PDF]
Astrophysical Journal, 2011 43 pages, 18 ...
Allard Jan van Marle +2 more
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A Cancellation Nanoflare Model for Solar Chromospheric and Coronal Heating [PDF]
Astrophysical Journal Letters, 2018 Abstract Nanoflare models for heating the solar corona usually assume magnetic braiding and reconnection as the source of the energy. However, recent observations at record spatial resolution from the Sunrise balloon mission suggest that photospheric magnetic flux cancellation is much more common than previously realized.
Petros Syntelis +2 more
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Simulations of Prominence Formation in the Magnetized Solar Corona by Chromospheric Heating [PDF]
Astrophysical Journal Letters, 2012 Starting from a realistically sheared magnetic arcade connecting chromospheric, transition region to coronal plasma, we simulate the in-situ formation and sustained growth of a quiescent prominence in the solar corona. Contrary to previous works, our model captures all phases of the prominence formation, including the loss of thermal equilibrium, its ...
Chun Xia, Peng-Fei Chen, Rony Keppens
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Atmospheric Heating in Solar Flares by Chromospheric Condensation
Astrophysical Journal, 1994 More and more observational and theoretical evidence has shown the existence of a chromospheric condensation during solar flares. Can such a chromospheric condensation play a role in the energy process of the chromospheric flare? In this paper, we have empirically studied the influence of the chromospheric condensation on the distribution of the ...
W Q Gan, P J D Mauas
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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 ...
Richard C Canfield
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Heating of the solar chromosphere and corona
Astrophysics and Space Science, 1976The generalized inhomogeneous wave equation that governs magnetoacoustic, vortical and thermal motions in compressible fluids and that thus is applicable to the problem of the heating of the solar chromosphere and corona is obtained. The effects of kinematic and bulk viscosity, heat conduction, Joule dissipation and magnetic diffusivity are included ...
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Wave heating of the solar chromosphere
Journal of Astrophysics and Astronomy, 2008The nonmagnetic interior of supergranulation cells has been thought since the 1940s to be heated by the dissipation of acoustic waves. But all attempts to measure the acoustic flux have failed to show sufficient energy for chromospheric heating. Recent space observations with TRACE, for example, have found 10% or less of the necessary flux.
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Heating of the Solar Chromosphere by MHD-Waves
1991We calculate a semi-theoretical model of the lower part of the chromosphere with the aid of the Vernazza et al. (1981) emission coefficients. The equality of the radiative emission coefficient and the absorption coefficient of weak MHD shock waves is assumed.
R. Erdélyi, M. Marik
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Vertical and horizontal heating in solar chromosphere
Chinese Astronomy and Astrophysics, 1985Abstract Anisotropy of the stress tensor of turbulent waves is used in this paper to explain the effects of Alfven waves in a magnetic tube. Under the conditions of a force-free field with negligible thermal conduction and convection, the equations governing the behaviour of a one-dimensional steady flow are derived.
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An analysis of heat transfer in the solar photosphere and chromosphere
Geomagnetism and Aeronomy, 2017The prevailing heat transfer processes—convection in the photosphere and wave propagation in the chromosphere—are principally different. Despite this fact, there is a direct link between these processes: it is precisely convective photospheric flows that excite intense Alfven waves in the chromosphere.
I. A. Molotkov, S. A. Vakulenko
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