XookSuut a code for modeling circular and non–circular flows on 2D velocity maps. (arXiv:2110.05095v2 [astro-ph.GA] UPDATED)
<a href="http://arxiv.org/find/astro-ph/1/au:+Lopez_Coba_C/0/1/0/all/0/1">Carlos L&#xf3;pez-Cob&#xe1;</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Lin_L/0/1/0/all/0/1">Lihwai Lin</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Sanchez_S/0/1/0/all/0/1">Sebasti&#xe1;n F. S&#xe1;nchez</a>

We present XookSuut, a tool designed to model circular and noncircular flows
on resolved velocity maps, such as IFS data or HI~data. XookSuut performs
nonparametric fits to derive kinematic models without assuming analytical
functions on the different velocity components of the models. This tool is
useful to recover the circular and radial motions in galaxies in dynamical
equilibrium. It is also useful to derive the non-circular motions induced by
oval distortions, such as that produced by stellar bars. XookSuut combines a
chi–square analysis and a Metropolis-Hastings method to converge to the
most-likely model based on the posterior probability. The code has its best
performance in galaxies with inclination angles ranging between
$25^circ<i<75^circ$. Among the different parameters derived by the code, the
larger errors are produced in the estimation of the bar position angle
$pm5^{circ}$. XookSuut is an alternative program among the different ones
focused on the kinematic analysis of galaxies. Finally, being written in Python
language, one of the most popular languages in the astronomical community
nowadays, it is simple to distribute, install and implement in any analysis
package.

We present XookSuut, a tool designed to model circular and noncircular flows
on resolved velocity maps, such as IFS data or HI~data. XookSuut performs
nonparametric fits to derive kinematic models without assuming analytical
functions on the different velocity components of the models. This tool is
useful to recover the circular and radial motions in galaxies in dynamical
equilibrium. It is also useful to derive the non-circular motions induced by
oval distortions, such as that produced by stellar bars. XookSuut combines a
chi–square analysis and a Metropolis-Hastings method to converge to the
most-likely model based on the posterior probability. The code has its best
performance in galaxies with inclination angles ranging between
$25^circ<i<75^circ$. Among the different parameters derived by the code, the
larger errors are produced in the estimation of the bar position angle
$pm5^{circ}$. XookSuut is an alternative program among the different ones
focused on the kinematic analysis of galaxies. Finally, being written in Python
language, one of the most popular languages in the astronomical community
nowadays, it is simple to distribute, install and implement in any analysis
package.

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