Abstract Details
| Name: Aardra S Affiliation: CHRIST (Deemed to be University), Bangalore Conference ID: ASI2025_570 Title : Gas Kinematic Investigation of Cometary Globule - LBN 437 using TRAO Observations Authors and Co-Authors : Aardra S 1, Namitha Issac 2, Archana Soam 3, Blesson Mathew 1, Chang Won Lee 4, 5, Maheswar Gopinathan 3 Abstract Type : Poster Abstract Category : Stars, Interstellar Medium, and Astrochemistry in Milky Way Abstract : Bright-rimmed, cometary-shaped star-forming globules, associated with HII regions, are remnants of compressed molecular shells exposed to ultraviolet radiation from central OB-type stars. The interplay between dense molecular gas and ionizing radiation, analyzed through gas kinematics, provides insights into the nature and dynamic evolution of these globules. We present the kinematic study of the cometary globule, Lynd’s Bright Nebula (LBN) 437, focusing on the first rotational transition of the 12CO and C18O molecular lines, observed using the Taeduk Radio Astronomy Observatory (TRAO). The kinematic information retrieved from the spectral-line maps traces the gas dynamics in LBN 437. The averaged 12CO spectrum shows a slightly skewed profile, suggesting the possibility of a contracting cloud. The molecular line profiles reveal signatures of infalling gas in the cometary head of LBN 437, indicating the initial stages of star formation. We also estimate the infall velocity and mass infall rate towards the cometary head of LBN 437. The estimated mass infall rate aligns well with the previous studies on intermediate or high-mass star formation, indicating that the cometary head of LBN 437 is a potential site for high-mass star formation. |