MASC
MASC (Make a star cluster) is an AMUSE-based script to generate a star cluster, to be used in N-body simulations or for other purposes. It aims to include all popular distribution models, initial mass functions, and many more features.
Supported features
- Stellar distributions: Plummer, King, fractal-based
- Initial mass function: Salpeter, Kroupa, equal-mass
- Metallicity
- Virial ratio
Not yet supported features
- Stars in initial binary/triple/multiple configurations
- Other particles than stars
Requirements
MASC requires AMUSE (https://github.com/amusecode/amuse) to work.
Usage:
Package version:
from amuse.units import units
from amuse.ext.masc import new_star_cluster
cluster = new_star_cluster(
number_of_stars=1024,
# stellar_mass=False,
initial_mass_function='salpeter',
upper_mass_limit=125.0 | units.MSun,
effective_radius=3.0 | units.parsec,
star_distribution='plummer',
# star_distribution_w0=7.0,
# star_distribution_fd=2.0,
star_metallicity=0.01,
)
Standalone version:
$ python make_a_star_cluster.py -h
usage: make_a_star_cluster.py [-h] [-o CLUSTERNAME] [-type FILE TYPE]
[-N NUMBER_OF_STARS] [-M CLUSTER_MASS]
[-dist STAR_DISTRIBUTION]
[-gasdist GAS_DISTRIBUTION]
[-imf INITIAL_MASS_FUNCTION]
[-modelnr CLUSTER_MODEL_NUMBER]
[-kingw KING_PARAMETER_W0]
[-fractald FRACTAL_PARAMETER_FD]
[-uml UPPER_MASS_LIMIT] [-Z METALLICITY]
[-ibf INITIAL_BINARY_FRACTION]
[-R EFFECTIVE_RADIUS] [-vr VIRIAL_RATIO]
optional arguments:
-h, --help show this help message and exit
-o CLUSTERNAME Outputfile name [auto]
-type FILE TYPE Output file type ([amuse]/ascii/starlab/nemo)
-N NUMBER_OF_STARS Number of stars
-M CLUSTER_MASS Cluster mass (takes precedence over number of stars)
-dist STAR_DISTRIBUTION
Star distribution ([plummer]/king/fractal)
-gasdist GAS_DISTRIBUTION
Gas distribution ([none]/plummer/king/fractal) NOT
IMPLEMENTED YET
-imf INITIAL_MASS_FUNCTION
IMF ([kroupa]/salpeter/fixed)
-modelnr CLUSTER_MODEL_NUMBER
Model number
-kingw KING_PARAMETER_W0
King W0 parameter [7.0]
-fractald FRACTAL_PARAMETER_FD
Fractal distribution [2.0]
-uml UPPER_MASS_LIMIT
Upper mass limit (in MSun) [125.]
-Z METALLICITY Metallicity [0.01]
-ibf INITIAL_BINARY_FRACTION
Initial binary fraction (0-1) [0.] NOT IMPLEMENTED YET
-R EFFECTIVE_RADIUS Cluster radius [3.0] (parsec)
-vr VIRIAL_RATIO Virial ration [0.5], 0.5=stable, 0.75=just expelled
gas, 0.1=collapsing
COPYRIGHT/LICENSE
See LICENSE
