Computer experiments for the scientific analysis of data of the solar photosphere from observations and simulations M. Schüssler, D. Schmitt, A. Vögler.

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Presentation transcript:

Computer experiments for the scientific analysis of data of the solar photosphere from observations and simulations M. Schüssler, D. Schmitt, A. Vögler Max-Planck-Institut für Aeronomie XLAB Science Camp July 2003

How does granulation appear in observations? Correlation between brightness and vertical velocity Granulation in a computer simulation and comparison with observation Adaptation of the simulation results to the observational conditions Interaction of convection and magnetic field in a simulation: correlation between magnetic field, brightness and velocity Qualitative and quantitative description of images of the solar photosphere and recognition of physical correlations

Qualitative description Recognition of typical structures or patterns, typical sizes, comparison of various physical quantities

Quantitative description by statistical methods Mean value: Standard deviation:

Histogram: Scatter plot:

Working with IDL IDL = Interactive Data Language Package for the visualisation and analysis of data

Start with command „idl“, prompts with string IDL> IDL>.r idlrc: initial settings IDL>.r load: reads data sets i_obs, v_obs, i_sim, v_sim,... IDL> view,fn: displays a two-dimensional image, fn=i_obs, … IDL> statistics,fn: computes mean value and standard deviation IDL> histogram,fn: displays a histogram IDL> scatter,fn1,fn2: scatter plot IDL> smooth,fn: smoothes an image IDL> exit

Please, write detailed notes of your findings and results. Have fun!