Studying a hot molecular core embedded in a photodissociation region

AREAL, M. B.; MARTINEZ, N.; PARON, S.

Córdoba - Congreso virtual

Congreso; 63 Reunión Anual de la Asociación Argentina de Astronomía; 2021

Asociación Argentina de Astronomía

At the first Galactic quadrant, atl= 33.134,b=−0.091, an extended photodissociation regiongenerated by an Hiiregion complex lies. This region is related to abundant molecular gas, and particularly, a hotmolecular core, known as G33.133-mm3, appears embedded in a molecular clump. Using data from the JamesClerk Maxwell Telescope with an angular resolution of about 15′′, we studied the13CO/C18O abundance ratiotowards the mentioned molecular clump and its relation with the ultraviolet radiation. At smaller spatial scales,using data from the Atacama Large Millimeter Array (angular resolution about 0.7′′), the hot molecular coreG33.133-mm3, that has a size of about 2600 au. and is an appropriate site to form stars, was characterized. Inparticular, some points about its chemistry are mentioned based on the emission of the cyanide or nitrile radical(CN) and others more complex molecules, such as CH3OH, CH3CN, CH3OCHO, and CH3CCH.