Name:

calculate_beff.pro

Purpose:

Calculates the effective connected magnetic field strength of an active region. 

Calling sequence:

Beff=calculate_beff(c_img, pix_size, Bz_thres=Bz_thres, min_flux=min_flux, min_size=min_size, out_Stru=blos_stru, smooth=smooth)

Input parameters:

c_img : Br or Blos HARP cutout magnetogram, corrected for limb presence. Blos cutout should be deprojected.

pix_size : the pixel size in arcsec

Keywords:

Bz_thres: minimum magnetic strength considered

Min_flux : minimum enclosed flux for a partition to be considered. Partitions with lower enclosed magnetic flux are discarded

Min_size : minimum area of the acceptable partitions (in pixels)

out_stru : an output structure that contains several optional outputs such as the separation length, the total magnetic flux that is contained in the partitions, the partition mask etc.

smooth : the width of a smoothing window performed to the input magnetogram, prior to partitioning.

Output:

Beff : the effective connected magnetic field strength

Property name in DB:

beff_Br.beff, beff_Blos.beff

Repository:

https://dev.flarecast.eu/stash/projects/FE/repos/beff-idl/browse

References:

Georgoulis & Rust, 2007, The Astrophysical Journal Letters, 661, 1