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SA: The physical and chemical signatures of young protostars and planet-forming disks. – Artur V

April 18 @ 2:30 pm 3:15 pm CMT

In the process of low-mass star formation, a protoplanetary disk is assembled around the young star and planets will form within this disk. Therefore, the chemical composition of the early disk is crucial for the gaseous content of future planetesimals. Some molecular species are believed to survive from the parental cloud to the inner regions of the disk, while others are being destroyed or formed by some physical processes that alter the chemistry of the disk. In this talk, I will summarize our current knowledge of the main physical and chemical processes that are involved in the formation of low-mass stars and planets, and present new ALMA observations of a particular protostar, IRS 44. A peculiar strong and warm emission of sulphur-related species is seen towards this source, suggesting the presence of shocks when material from the envelope reaches the disk. These shocks will have important consequences on the material available at the time of planet formation.

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