Poster Presentation

Gas kinematic for protocluster G330.954-00.182 using ATOMS Data

Author(s): Shivani Gupta, Archana Soam, Tapas Baung

Presenter: Shivani Gupta (Indian Institute of Astrophysics)

Massive star-forming regions provide key insights into early stellar evolution and interstellar medium conditions. In this study, we analyze ATOMS (ALMA Three-millimeter Observations of Massive Star-forming Regions) data for the protocluster G330.954-00.182 across multiple molecular lines, including H¹³CN, H¹³CO⁺, CCH, SiO, and HCN. Spectral line profiles are identified and fitted using Gaussian functions to characterize their kinematics and intensity distributions. Moment maps (zero, first, and second moments) are generated to study velocity structures, intensity variations, and dispersion, while velocity-channel maps reveal molecular emission distributions across different velocity components.
A comparative analysis of molecular tracers distinguishes shock-tracing species (SiO), high-density gas tracers (H¹³CN, H¹³CO⁺), and warm gas components (HCN, CCH), enabling the identification of dense cores, outflows, and shock-affected regions. Position-velocity (P-V) diagrams are constructed to analyze outflows and velocity gradients, providing insights into the physical conditions, kinematics, and chemical variations influencing massive star formation.