lauralwatkins / mgetools

A collection of python functions to calculate various quantities and perform various tasks for Multi-Gaussian Expansions (MGEs).

MGETOOLS

CONTENTS

• license and referencing
• code description
• requirements

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LICENSE AND REFERENCING

This code is released under a BSD 2-clause license.

If you find this code useful for your research, please mention it in your acknowledgements.

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CODE DESCRIPTION

This is a collection of python functions for generating various quantities for Multi-Gaussian Expansions (MGEs). Please use/add to/modify them.

• Cumulative2D : Cumulative profile from a 2-dimensional MGE.
• Cumulative3D : Cumulative profile from a 3-dimensional MGE.
• Deproject: De-project a 2-dimensional MGE.
• Project : Project an 3-dimensional MGE.
• SurfaceDensity : Surface density of 2-dimensional MGE.
• VolumeDensity: Volume density of 3-dimensional MGE.

The MGEs themselves should be given as an astropy Table or QTable, with units for the components as necessary. The structure assumes:

• "i" : central volume or surface density of the MGE component
• "s" : width of the MGE component
• "q" : flattening of the MGE component

Directory Example contains a datafile with an example MGE, and a jupyter notebook with some usage examples and tests for each function.

Emsellem, Monnet & Bacon (1994) and Cappellari (2002) are good references if you wish to learn more about MGEs and their uses.

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REQUIREMENTS

This code assumes you are using Python3. It uses astropy and the standard python libraries numpy and scipy.