Abstract Details

Name: Dipen Sahu
Affiliation: Academia Sinica Institute of Astronomy and Astrophysics
Conference ID: ASI2020_516
Title : Millimeter astronomy; the role of ISM molecules in understanding the physics and chemistry of low mass star-forming regions
Authors and Co-Authors : Dipen Sahu, Sheng-Yuan Liu, Chin-Fei Lee, Naomi Hirano, Yu-Nung Su et al.
Abstract Type : Poster
Abstract Category : Stars, ISM and Galaxy
Abstract : The millimeter and sub-millimeter (mm/submm) wavebands are unique in astronomy for probing cold dust, molecules, low-temperature cocoons of protostars and protoplanets. A fundamental discovery of mm/submm astronomy was the recognition that molecular clouds exist. Till now, around 200 molecules have been reported in the interstellar medium (ISM) and the maximum of them mainly detected using mm/submm facilities. The interpretation of molecular data requires the knowledge of interstellar chemistry, radiative transfer, atomic and molecular physics. The high sensitivity and high resolution (spatial and spectral) of ALMA have allowed us to study the young stellar objects in more detail, especially using molecular line tracers/astronomy. In this talk, I will discuss some results of ALMA observations toward low mass protostars HH212 (a pristine jet disk system) and NGC1333 IRAS 4A ( proto-binary). Additionally, I will discuss significant results for a sample of prestellar/starless cores in Orion. In connection to these observations, I will discuss the role of molecular line transitions, deuterated molecules and complex molecules to interpret the physical processes, e.g. infall, rotation, outflow, physical evolution in the star-forming regions.