README for tabulate_progenitor_probability.py

Reference:

Martin et al. 2018a, Martin, G., Kaviraj, S., Devriendt J. E. G., Dubois Y., Pichon C. and Laigle C., MNRAS, 474, 3140

Contact:

g.martin4@herts.ac.uk

Purpose:

Reads fractions.dat binary file and returns the joint progenitor probability for given redshift, mass, environment (percentile) and star-formation rate (i.e. the probability that a galaxy with given properties has spheroidal morphology at z=0). If one or more dimensions are not specified, the joint progenitor probability is returned with missing dimensions marginalised out.

Prerequisites:

• fractions.dat
• numpy
• scipy

Installation:

pip install progenitor-probability

Usage:

Using the built-in script:

tabulate_progenitor_probability.py -z 0.4 -m 10.8
0.266751184855

tabulate_progenitor_probability.py --help

usage: tabulate_progenitor_probability.py [-h] [-z REDSHIFT] [-m MASS]
                                          [-p DENSITY] [-s SFR]

optional arguments:
  -h, --help            show this help message and exit
  -z REDSHIFT, --redshift REDSHIFT
                        Redshift
  -m MASS, --mass MASS  Log10 stellar mass/M_sun
  -p DENSITY, --density DENSITY
                        Local number density percentile [0,100]
  -s SFR, --SFR SFR     SFR in M_sun/yr

-z redshift

-m log₁₀(stellar mass / M_sun)

-p percentile of local number density in the range [0,100] (see Martin et al. 2018a)

-s star formation rate in M_sun/yr

Importing the package

from progenitor_probability import progenitor_probability
>>> progenitor_probability(redshift=0.4, mass=10.8)
0.266751184855