  Aims: To investigate the characteristics of the bar and inner disk in the
collisional ring galaxy Cartwheel. Methods: We used the Integral Field Unit
(IFU) observations with Multi-Unit Spectroscopic Explorer (MUSE) of the Very
Large Telescope (VLT) to investigate the stellar kinematics, age, and nature of
ionised gas in the inner region of the Cartwheel. We produced the stellar line
of sight (LOS) velocity (V), velocity dispersion ($\sigma$), h$_3$ velocity
moment, stellar population age, and emission-line maps of the galaxy using the
Galaxy IFU Spectroscopy Tool (GIST) pipeline. Results: The observed nature of
intensity, V, and $\sigma$ profiles altogether support the existence of a
stellar bar as earlier revealed from near-infrared (NIR) $K_s$ band imaging. A
weak correlation between V/$\sigma$ and h$_3$ is found within the bar radius,
providing more kinematic evidence for a stellar bar which survived the
drop-through collision. The overall weak anti-correlation between V/$\sigma$
and h$_3$ in the disk implies that the stellar orbits in the disk are less
stable, which might be due to the impact of the collision. The mass-weighted
age map of the galaxy shows that the stellar populations in the bar region are
relatively older, with an increasing gradient from the bar edge to the centre,
another evidence to signify that the bar was present before the galaxy
underwent collision. We do not find an active galactic nuclei (AGN) from the
BPT analysis of a central unresolved source reported earlier using NIR imaging.
Our findings provide the preservation of the pre-collisional structures in the
inner region of the Cartwheel, an important input to understanding the
evolution of collisional galaxy systems, particularly investigating the
pre-collisional central region for theoretical studies.
