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Central European Astrophysical Bulletin, Vol. 38 No. 1, 2014.

Conference paper

Detection of small convective patterns in observations and simulations

Birgit Lemmerer ; IGAM/Institute of Physics, University of Graz, Graz, Austria
Dominik Utz ; IGAM/Institute of Physics, University of Graz, Graz, Austria
Arnold Hanslmeier ; IGAM/Institute of Physics, University of Graz, Graz, Austria
Astrid Veronig ; IGAM/Institute of Physics, University of Graz, Graz, Austria
H. Grimm-Strele ; Institute of Mathematics, University of Vienna, Vienna, Austria
S. Thonhoffer ; IGAM/Institute of Physics, University of Graz, Graz, Austria
I. Piantschitsch ; IGAM/Institute of Physics, University of Graz, Graz, Austria

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Abstract

Recent results from high resolution solar granulation observations indicate the existence of a population of small granular cells
on scales below 600 km in diameter, located in the intergranular lanes. We studied a set of Hinode SOT images and high resolution radiation hydrodynamics simulations in order to analyze small granular cells and to study their physical properties. An automated image segmentation algorithm specifically adapted to high resolution simulations for the identification of granules was developed. The algorithm was also used to analyze and compare physical quantities provided by the simulation and the observations. We found that small granules make a distinct contribution to the total area of granules. Both in observations and simulations, small granular cells exhibit on average lower intensities and vertical velocities.

Keywords

granulation; Hinode; ANTARES

Hrčak ID:

143571

URI

https://hrcak.srce.hr/143571

Publication date:

20.11.2014.

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