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DTSTART;TZID=Europe/Paris:20241129T140000
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DTSTAMP:20260413T134348
CREATED:20241123T084512Z
LAST-MODIFIED:20241126T082012Z
UID:11177-1732888800-1732899600@fermi.univ-tlse3.fr
SUMMARY:Study of carbonaceous nanograins-water interactions in the era of James Webb Space Telescope. - (Arya M Nair / Thesis / LCAR)\, 29/11/2024\, 14H
DESCRIPTION:PhD defense \nArya M Nair   FeRMI\, Salle de conférence 3R4 \nComposition du jury: \n\nJean Hugues Fillion (Sorbonne Université)\nJennifer Noble (Aix-Marseille Université)\nFranck Le Petit (Observatoire de Paris)\nAude Simon (Université Toulouse III)\nChristine Joblin (Université Toulouse III)\nSébastien Zamith (Université Toulouse III)\n\n  \nAbstract:\nThe aromatic infrared bands (AIBs) observed in the interstellar medium is attributed to the emission from a group of molecules called Polycyclic Aromatic Hydrocarbons (PAHs). In the dense clouds that are shielded from UV radiations\, interstellar dust is coated by ices in which water plays a key role. This PhD thesis in the field of laboratory astrophysics aims to study of interaction of water with these PAHs under controlled physical conditions. \nMore precisely\, positively charged mixed PAH (here pyrene)-water clusters are produced in a cryogenic gas aggregation source prior to thermalization at 25K. The mass selected cluster undergo collisions with inert gases and the products are analyzed using time-of-flight mass spectrometry. Experiments were also performed on deuterated system to understand H/D exchange mechanism. \nThe studies provide information regarding the dissociation energy and hence helps to characterize the structure of the cluster. The molecular data obatined could be used to model these interactions in star- and planet-forming regions.
URL:https://fermi.univ-tlse3.fr/event/study-of-carbonaceous-nanograins-water-interactions-in-the-era-of-james-webb-space-telescope-arya-m-nair-thesis-lcar-29-11-2024-14h/
LOCATION:Salle de conférence\, Bâtiment 3R4
CATEGORIES:Events,HDR / Thesis,LCAR
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