Reversed granulation in mid-photosphere of the Sun

Reversed granulation is predicted by numerical simulations and has been observed in the wings of chromospheric lines. Here we present reversed granulation in high spatial, spectral and temporal resolution, extracted from the photospheric Fe I 7090.4 Å line core intensities, once taking into account...

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Bibliographic Details
Published in:Proceedings of the International Astronomical Union 2006-08, Vol.2 (S239), p.163-165
Main Authors: Janssen, Katja, Cauzzi, Gianna
Format: Article
Language:English
Subjects:
Astronomy
Astrophysics
Atmosphere
Contributed Papers
Sun
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Summary:Reversed granulation is predicted by numerical simulations and has been observed in the wings of chromospheric lines. Here we present reversed granulation in high spatial, spectral and temporal resolution, extracted from the photospheric Fe I 7090.4 Å line core intensities, once taking into account the velocity effects. Correlations with the continuum are studied in terms of smoothing, time delay and temporal evolution. The latter appears to be superimposed with an oscillatory signal that suggests the presence of gravity waves in the mid-photosphere.
ISSN:1743-9213
1743-9221
DOI:10.1017/S174392130700035X