In order to study the dependence of granulation intensity and velocity fields with photospheric vertical and horizontal scale, we analyze white-light and monochromatic frames obtained in two spectral ranges around 538.03 nm (C I line) and 557.61 nm (Fe I line). The images, obtained from the disk center of the sun, are acquired with the Italian Panoramic Monochromator (IPM) at the THEMIS telescope in the Observatorio del Teide (Tenerife, Spain). Granules and granulation cell boundaries are extracted by segmentation of white-light images using suitable algorithms. We superimpose these white-light features to C I and Fe I velocity and intensity frames to study the connection between granulation and overshooting region dynamics.

Dynamics of the photospheric vertical flow

PIETROPAOLO, Ermanno;
1999-01-01

Abstract

In order to study the dependence of granulation intensity and velocity fields with photospheric vertical and horizontal scale, we analyze white-light and monochromatic frames obtained in two spectral ranges around 538.03 nm (C I line) and 557.61 nm (Fe I line). The images, obtained from the disk center of the sun, are acquired with the Italian Panoramic Monochromator (IPM) at the THEMIS telescope in the Observatorio del Teide (Tenerife, Spain). Granules and granulation cell boundaries are extracted by segmentation of white-light images using suitable algorithms. We superimpose these white-light features to C I and Fe I velocity and intensity frames to study the connection between granulation and overshooting region dynamics.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11697/37589
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