MBProj2D¶
https://github.com/jeremysanders/mbproj2d
Copyright (C) 2020 Jeremy Sanders <jeremy@jeremysanders.net>
MBProj2D is released under the GNU Lesser General Public License version 3 or greater. See the file COPYING for details.
More documentation can be found at http://mbproj2d.readthedocs.io/
Introduction¶
MBProj2D (MultiBand Projector 2D) is a code which forward-models images of galaxy clusters. Using a single X-ray band the model would be sensitive to the density of the intracluster medium (ICM). By using multiple bands the code is able to model the temperature variation within the cluster. Given sufficient energy bands the metallicity of the ICM can also be fitted.
MBProj2D can assume hydrostatic equilibrium using a mass model. From this model (with an outer pressure parameter and the density profile) the pressure profile can be computed for the cluster. This allows the temperature to be computed on small spatial scales, which would otherwise not have enough data to compute the temperature independently. If no hydrostatic equilibrium is assumed then MBProj2D can fit for the temperature of the ICM instead.
The model is normally first fit to the surface brightness images. MCMC using the emcee module is used to compute a chain of model parameters, from which posterior probability distributions can be computed for a large number of model and physical parameters.
Requirements¶
MBProj2D requires the following:
Python 3.3+ or greater
emcee https://emcee.readthedocs.io/en/stable/ (Python module)
h5py http://www.h5py.org/ (Python module)
numpy https://www.numpy.org/ (Python module)
scipy https://www.scipy.org/ (Python module)
astropy https://www.astropy.org/ (Python module)
pyfftw https://pypi.org/project/pyFFTW/ (Python module)
cython https://cython.org/
Installation¶
You can either install the module through its setup script:
$ python setup.py build
$ python setup.py install
or install via pip:
$ pip install git+https://github.com/jeremysanders/mbproj2d.git