Pack: Propagation of properties extracted from the HyperLEDA catalog in the calculation of luminosities of galaxies

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Calculation of distances, corrected apparent B magnitude mB-corr and luminosities with values gathered from the HyperLEDA database.

This workflow receives a list of galaxy names (hyperLEDA names. ie: KIG0001) and a file with the morphological types 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. The performance could be improved since only one query per galaxy is needed for the extraction of five physical properties. Nevertheless, we have decided to split the query into five different queries and provide a more modular workflow, which is best suited for aims of re-usability and re-purposability. It may happen that for other physical properties, values may come from different databases.

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This workflow receives two files, the name of a table and the name of a field as input. One of the file should be contain a list of old values (name galaxy and value), and the other one should be a list of new values (name galaxy,value) The workflow makes a comparison between the two files. This comparison will be a list of 7 columns: name of the galaxy, old value, old error, new value, new error, difference of value, difference of error.

In other hand, this workflow makes a sql script with the command to update/create the table and filed given, with the new values.

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Content description of the Research Object "Propagation of properties extracted from the HyperLEDA catalog in the calculation of luminosities of galaxies" developed in the Wf4Ever project.

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This document describes the development of the first Golden Exemplar proposed in Work Package 5: Workflow Astronomy Preservation in the context of the Wf4Ever Project. It pertains to the deployment of a Research Object (RO) associated to the study of the propagation of astrophysical quantities in the calculation of luminosities of galaxies. 

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The user provides an ASCII text file with a list of galaxy names, and the workflow queries the HyperLEDA database and parses the response with the help of regular expressions included in simple Python scripts. The result of the workflow is a series of ASCII text files with the values of the equatorial coordinates in J2000 epoch, the velocities in km/s, the dust extinction coefficient Ag, the axis ratio of the isophote 25 mag/arcsec2 logr25 and the apparent total B magnitude BT. The performance could be improved since only one query per galaxy is needed for the extraction of five physical properties. Nevertheless, we have decided to split the query into five different queries and provide a more modular workflow, which is best suited for aims of re-usability and re-purposability. It may happen that for other physical properties, values may come from different databases.

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Recipes explaining how to use the Research Object "Propagation of properties extracted from the HyperLEDA catalog in the calculation of luminosities of galaxies" developed in the Wf4Ever project

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This workflow takes as input a file for each of this properties: 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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Description of purpose of the Research Object "Propagation of properties extracted from the HyperLEDA catalog in the calculation of luminosities of galaxies" developed in the Wf4Ever project.

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Python scripts used as local services in the workflows contained in RO Propagation of quantites.

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No description available