Colloq Abstract - Samantha Scibelli
November 18, 2022
11:00am Mountain
Samantha Scibelli (University of Arizona)
The Complex Chemistry and Evolution of Early-Stage Star and Planet Formation
Abstract
Before a low-mass(M < few solar masses)star like our Sun is formed, it is conceived insidea cold (~10 K) and dense (> 105 cm-3)region of gas and dust known as a starless or dynamically evolved prestellar core.Young stars and planet-forming disks inherit at least some of their chemical composition from this preceding stage that can drive further chemical complexity.In recent years, the detection of interstellar complex organic molecules (COMs), any molecule with at least one carbon atom and six total atoms, in prestellar cores has sparked interest in the star formation community due to astrochemical and astrobiological implications. In this talk, I will discuss recent detections of key COMs, such asacetaldehyde (CH3CHO), methyl formate (HCOOCH3) and vinyl cyanide (CH2CHCN), in starless and prestellar cores from my submillimeter radio telescope surveys.I will also present newhigh resolution(12 and 19 arcsecond) dust continuum (at 1.2mm and 2.0mm) 3D radiative transfer modeling resultsfor a subset of these COM-rich cores in the B10 region of the Taurus Molecular Cloud. The constraints on the physical properties and evolutionary states of these starless and prestellar corestells us about the initial conditions of COM chemistry that will seedlater-stage star and planet formation.
