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 Title: Spectroscopic Studies Of Methyl Formate And Its Formation Pathways In Space Upon Ion Irradiation Author(s): Traspas Muiña , Alejandra Contributor(s): Sulik, Béla; McCullough, Robert w; Mason, Nigel; Kaňuchová, Zuzana; Mifsud, Duncan; Kovács, Sándor T. S.; Juhász, Zoltan; Herczku, Peter; IOPPOLO, SERGIO Subject(s): Astronomy Abstract: All isomers of C$_{2}$H$_{4}$O$_{2}$, i.e. glycolaldehyde (HCOCH$_{2}$OH), acetic acid (CH$_{3}$COOH) and methyl formate (HCOOCH$_{3}$), have been observed abundantly around the Galactic center, in dark clouds, and hot cores of the interstellar medium (ISM), as well as in some comets of the Solar System. However, their exact gas-grain formation and destruction pathway is still unclear. According to El-Abd et al. (2019), the observed column densities of methyl formate and acetic acid are well-correlated, and are likely simply tracking the relative total gas mass in star forming regions. Methyl formate and glycolaldehyde, however, display a stark dichotomy in their relative column densities. The latter finding suggests that different formation/destruction routes are at play for the three isomers. To date, there is a strong laboratory evidence for an efficient production of glycolaldehyde, methyl formate, and acetic acid in the ISM (Gerakines et al. 1996; Bennett and Kaiser 2007; Modica et al. 2012). However, so far models and laboratory studies cannot fully reproduce the observed mutually exclusive presence of specific isomers in certain star formation regions. Understanding the formation of the C$_{2}$H$_{4}$O$_{2}$ isomers is an important step to verify the formation of yet more complex molecules that are necessary for life. In this talk, I will present our latest results obtained at the ion accelerator ATOMKI facility in Debrecen (Hungary) using the novel ultrahigh vacuum ICA end station. Results will be discussed in light of upcoming JWST mission. Issue Date: 2021-06-25 Publisher: International Symposium on Molecular Spectroscopy Genre: Conference Paper / Presentation Type: Text Language: English URI: http://hdl.handle.net/2142/111323 Date Available in IDEALS: 2021-09-24
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