Chemical Complexity and Evolution of Low-mass Starless and Prestellar Cores-Samantha Scibelli (UofA) скачать в хорошем качестве

Chemical Complexity and Evolution of Low-mass Starless and Prestellar Cores-Samantha Scibelli (UofA)

Origins Seminar presented on May 9, 2022. Title: Observational Constraints on the Chemical Complexity and Evolution of Low-mass Starless and Prestellar Cores Speaker: Samantha Scibelli (Steward Observatory, Univ. of Arizona) Abstract: Before a low-mass (M ≤ few solar masses) star like our Sun is formed, it is conceived inside a cold (~10 K) and dense (over 10^5 cm^-3) region of gas and dust known as starless or dynamically evolved prestellar core. It is essential to study the chemical complexity and evolution of prestellar cores because they set the initial conditions of star and planet formation. Observations of complex organic molecules (COMs) in prestellar cores has sparked interest in the star formation community due to the astrochemical and astrobiological implications. I will discuss my observations and abundance measurements of COMs in prestellar and starless cores in the Taurus Molecular Cloud, the prevalence of which support the idea that some COMs are seeded early on before the formation of protostars and planets. I also will discuss my recent modeling efforts to pinpoint the exact evolutionary states of a subset of these cores. Outside of Taurus, it is still unclear how abundance and evolutionary trends hold for prestellar cores in different environments. I will present early results from a new COM survey in the Perseus and Aquila molecular clouds that targets more than 50 starless cores. I stress that studying the limits of chemical complexity in prestellar cores is crucial for tracing how COMs are inherited from a cold core to a planetary system. Find more information about the Origins Seminar series here: http://eos-nexus.org/origins-seminar/