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Solar Physics, 1968
Pairs of spectra exposed simultaneously in the yellow and ultraviolet show exactly the same solar granulation in the two colors. This is contrary to Vassilyeva's earlier results. The difference is probably due to her neglect of atmospheric dispersion.
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Pairs of spectra exposed simultaneously in the yellow and ultraviolet show exactly the same solar granulation in the two colors. This is contrary to Vassilyeva's earlier results. The difference is probably due to her neglect of atmospheric dispersion.
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1999
The series of lectures I gave at the Kanzelhohe summer-school, are presented here in the form of a wide overview of our current knowledge on the solar granulation, including observational results as well as theoretical modelling. A brief description of techniques of observation and image processing are included.
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The series of lectures I gave at the Kanzelhohe summer-school, are presented here in the form of a wide overview of our current knowledge on the solar granulation, including observational results as well as theoretical modelling. A brief description of techniques of observation and image processing are included.
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Variability of solar granulation
Advances in Space Research, 1988Abstract The temporal variation of the mean size of granules recently discovered (Macris et al., 1983; Macris et al. 1983; Muller and Roudier, 1984) is confirmed using a new set of photographs of higher quality and homogeneity : granules are smaller at sunspot maximum.
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Convection and the Solar Granulation
1979If we observe the sun in the continuum of its spectrum, the surface shows a mosaic-like intensity structure that is called “granulation” in astrophysics, Fig. 1. This structure was first observed in 1877 by the French astronomer Jansen who also gave it its name. Since the “discovery” of a convectively unstable layer in the solar atmosphere by Unsold in
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Mesostructure of the solar granulation
Astronomy Letters, 2000Quasi-periodic variations in the thermodynamic and hydrodynamic fine-structure properties of the granulation field along the photospheric surface are estimated quantitatively. The darkest vast intergranular lanes, called the intergranular knots, are the most important indicator of their physical properties.
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A Convective Model of Solar Granulation
Publications of the Astronomical Society of Australia, 1983Some years ago the full non-linear equations, within the one mode approximation, describing finite amplitude convection in a compressive medium with polytropic structure were derived (Van der Borght 1977). It is the purpose of the present paper to report on the numerical integrations of these equations and to show how these can be used to construct a ...
R. Van der Borght, P. Fox
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1989
During the last few years the solar granulation has been extensively investigated thanks to new high quality material, and to the development of sophisticated and powerful image processing techniques. The material consists of distorsion-free granulation movies performed with the SOUP experiment on board of Spacelab-2 and of high resolution ground-based
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During the last few years the solar granulation has been extensively investigated thanks to new high quality material, and to the development of sophisticated and powerful image processing techniques. The material consists of distorsion-free granulation movies performed with the SOUP experiment on board of Spacelab-2 and of high resolution ground-based
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1989
Workshop Introduction.- 1: Observational Techniques.- Observations of the Solar Granulation at the Pic Du Midi Observatory and with THEMIS.- The Gregory-Coude-Telescope at the Observatorio Del Teide, Tenerife.- The Status of the Latest German Solar Facility on Tenerife.- Ground-Based Tunable Filter Observations.- An Overview of the Orbiting Solar ...
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Workshop Introduction.- 1: Observational Techniques.- Observations of the Solar Granulation at the Pic Du Midi Observatory and with THEMIS.- The Gregory-Coude-Telescope at the Observatorio Del Teide, Tenerife.- The Status of the Latest German Solar Facility on Tenerife.- Ground-Based Tunable Filter Observations.- An Overview of the Orbiting Solar ...
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Morphological study of the solar granulation
Solar Physics, 1984Time-sequential high quality photographs of the photospheric granule on a quiet region of the disc center obtained at the Pic-du-Midi Observatory by Kawaguchi are analyzed. The size variation of individual granules in the area of 54″×52″ on the photosphere are traced over a period of 4 min.
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A solar granulation spectrogram
Solar Physics, 1968J. G. Kirk, W. Livingston
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