Star-forming regions (SFRs) are ideal for studying the characteristics of young stellar populations, such as their age, mass accretion rates, and other properties. These investigations become even more intriguing when the molecular cloud, where star formation may occur, is influenced by external factors like radiation. Massive stars, whether located within the cloud or at a distance, can significantly affect the cloud, potentially altering the star formation efficiency or rate, the cloud’s structure and dynamics, and even the behaviour of the young stellar objects (YSOs).
We focused on bright-rimmed clouds (BRCs), the remnant clouds illuminated by nearby massive stars, and the YSOs embedded within these clouds. Here, we present the multi-wavelength analyses of BRC 44 utilising optical and near-infrared observations from the 3.6m Devasthal Optical Telescope (DOT), mid-infrared data from the Spitzer, and millimeter CO data from the Purple Mountain Observatory.
The stellar properties are analysed using optical and infrared data through spectral energy distribution (SED) fitting, spectroscopy, and color-magnitude diagrams. Meanwhile, the cloud's structure and dynamics are studied using CO data. In addition to radiative feedback, Cloud-Cloud Collisions (CCC) is an important mechanism that facilitates star formation, particularly massive star formation, as CCC is a progenitor for hub filament structures. We investigate the CCC scenario in the Sh2-140 region, southwest of BRC 44, using Herschel SPIRE and PACS data in conjunction with millimeter data to examine CCC, filament formation, and the young stellar objects that may arise from this mechanism.