| Abstract: | We present a multiwavelength investigation of the massive star-forming region RAFGL2591, located at a distance of 3.3 kpc. It is particularly intriguing due to its peculiar central region, which harbours a cluster of protostars, H II regions and multiple jets; notably, the extended E-W protostellar jet exhibiting thermal radio emission from one lobe and non-thermal synchrotron radio emission from relativistic electrons in the opposing lobe. To elucidate the physical conditions within this region, we obtained radio images at frequencies of 325, 610, and 1280 MHz using the Giant Metrewave Radio Telescope (GMRT) in India. The radio analysis indicates that all HII regions display spherical morphology and exhibit positive spectral indices, confirming their thermal nature. Additionally, we analyzed archival data from UKIDSS, Spitzer, and Herschel to complement our findings. The dust temperatures associated with the HII regions, as obtained from the analysis of the Herschel images, are found to be in the range of 20 - 60 K. The column densities vary between 0.6 × 10^23 /cm^2 to 1.6 × 10^23 /cm^2. The derived masses of the H II regions span 31 M⊙ to 61 M⊙, with dynamical timescales estimated between 0.4 to 1.4 Myrs. A photometric examination of near and mid-infrared point sources highlights the presence of a young stellar object population associated with the cloud. Furthermore, CO observations, leveraging CARMA and ALMA data, enabled the construction of moment maps that identify gas structures, study turbulence, and distinguish between different velocity components. This provides invaluable insights into the physical and evolutionary states of the sources and the ambient medium, enhancing our understanding of the intricate processes at play in RAFGL2591.
|
