GalRotpy: a tool to parametrize the gravitational potential of disc-like galaxies

Abstract GalRotpy is a Python3 -based tool, intended to determine the contribution of each mass component to the gravitational potential of disc-like galaxies by means of their rotation curve. Besides, GalRotpy allows to perform a parametric fit of a given rotation curve, which relies on a MCMC procedure implemented by using emcee package. Here the gravitational potential of disc-like galaxies is built from the contribution of a Miyamoto-Nagai potential model for the bulge/core and the thin/thick disc, an exponential disc, together with the NFW (Navarro-Frenk- White) potential or the Burkert (cored density profile) potential for the Dark Matter halo, where each contribution is implemented by using galpy package. We summarize the properties of each contribution to the rotation curve involved, and then describe how GalRotpy is implemented along with its capabilities. Finally we present the characterization of two galaxies, NGC6361 and M33, and show that the results for M33 provided by GalRotpy are consistent with those found in the literature.