In the nearby universe, the interactions between galaxies have been observed to significantly influence the evolution of galaxies and their various components, e.g., dust, disk, gas or stellar bar. The consequences of close encounters between galaxies rich in cold gas reserves are particularly noteworthy, as they can initiate star formation. The colossal tidal forces generated during these galactic interactions lead to the stretching and deformation of the galaxies' disks and spiral arms, giving rise to streams of stars known as either "stellar bridges" or "tidal tails" as the galaxies pass each other. Studying multiwavelength data can unveil striking details regarding such interactions.
In this presentation, I will delve into a comprehensive study involving ultraviolet (UV), optical, and near-infrared (NIR) observations of a group of interacting barred galaxies. Notably, this study uncovers a remarkable dichotomy. While one of the galaxies exhibits active star formation along its central bar, the other does not, marking a unique finding in its category. Stellar bars within galaxies are typically considered long lived structures predominantly composed of old stellar populations. The presence of star-forming regions within these bars poses an interesting puzzle, prompting us to explore the evolutionary dynamics of stellar bars in the context of interacting galaxies. I will elaborate on the analytical methodologies employed and present the results derived from the combination of multiwavelength data. This rich dataset enables us to gain insights into the profound impact of interactions on the evolution of morphological components, particularly the enigmatic stellar bars.
BGS Office