The chemical link between comet 67P/C-G and low mass protostar IRAS 16293-2422: Integrative Studies in Observational Astronomy and Chemical-Dynamical Modeling

Abstract : Organic molecules are the building blocks of life and this is why the search for amino acids and their complex organic precursors at different stages of star and planet formation is one of the exciting topics in modern astronomy. Understanding how, when and where organics (simple as well as complex including potentially prebiotic molecules) are formed is one of the most important questions for Astrochemistry/Astrobiology. Complex organics have been detected in prestellar cores, protostars, and protoplanetary disks. Can a part of the organic content observed in these regions be preserved during the protostellar stages and incorporated into asteroids and comets, that can deliver it to planetary embryos through impacts? By looking at the cometary compositions, observations of solar-type protostars can help to address this critical question. In this context, here we will present our observations towards the solar-type protostar IRAS 16293-2422 in the 3mm band of the IRAM 30m telescope along with existing ALMA observations. We will also describe how the chemo-dynamical simulations using the state-of-the-art gas-grain-bulk chemical-kinetic model can help us to understand the chemical composition of comet 67P observed by Rosetta. For the first time, we will also shed light on to the possibility of protostellar inheritance of glycine (king of the ROSETTA Zoo) on to the comet 67P.
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Communication dans un congrès
42nd COSPAR Scientific Assembly. Held 14-22 July 2018, in Pasadena, California, USA, Abstract id. B1.3-15-18., Jul 2018, pasadena, United States. 2018
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https://hal.archives-ouvertes.fr/hal-01901852
Contributeur : Marie-Paule Pomies <>
Soumis le : mardi 23 octobre 2018 - 11:55:10
Dernière modification le : mercredi 24 octobre 2018 - 01:15:58

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Liton Majumdar, Valentine Wakelam, P. Gratier, Emmanuel Caux, J.-C. Loison, et al.. The chemical link between comet 67P/C-G and low mass protostar IRAS 16293-2422: Integrative Studies in Observational Astronomy and Chemical-Dynamical Modeling. 42nd COSPAR Scientific Assembly. Held 14-22 July 2018, in Pasadena, California, USA, Abstract id. B1.3-15-18., Jul 2018, pasadena, United States. 2018. 〈hal-01901852〉

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