Oral Presentation

The protostellar shocks as chemical laboratories

Author(s):

Presenter: Siyi Feng (NAOJ/NAOC)

In the earliest stage of star formation, shocks generated by protostellar jet compress and heat the surrounding gas intensively, driving complex chemistry, including endothermic chemical reactions, ice mantle sublimation, and sputtering. Gaseous molecular lines are now showing their power in tracing back the chemical history and the kinematics of the central protostellar object.
In this talk, I will present the chemical features towards two shocked regions, which are generated by the jets from a high-mass protostar and a low-mass protostar. Using IRAM-30m, NOEMA, and SMA, we unveiled the chemical similarities between these regions, e.g., the Sulfur resovior, the gas-dust forming paths of deuterated species and complex organics, etc. These chemical properties improve our understanding of the feedbacks of star-forming environment. Moreover, they indicate the precession of the protostellar jets which generate these shocks.