Calculation of distances, magnitutes and luminosities using HyperLEDA

Created: 2011-11-14 18:17:06      Last updated: 2012-01-11 18:11:57

This workflow receives a list of galaxy names (hyperLEDA names. ie: KIG0001) and a file with a the morphological type of those galaxies. Using the name of a galaxy, the workflow querys Hyperleda to extract some properties of this galaxy (J2000 Coordinates, velocity, galactic extinction,log of axis ratio, and the Total B-magnitude ). With this properties it calculates the distance of the galaxy and, in other hand, the Total apparent corrected B-magnitude. It takes account if the velocity of the galaxy is lower than a threshold (1000km/s), it can not be possible to calculate the distance so, in those cases the distance will be "NaN". At the end, it calculates the Total Luminosity using the velocity and the Total apparent corrected B-magnitude. More information in the nested workflows.

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