Space@VT Seminar Series - Savaria Parrish

Title: Characterizing the Atmosphere of L-T Transitionary Brown Dwarfs Using JWST and Atmospheric Models
Seminar Summary: This seminar will explore how we use the James Webb Space Telescope (JWST) to study the atmospheres of a special type of brown dwarf that transitions from L to T classification. Brown dwarfs are often seen as the middle ground between stars and giant gas planets like Jupiter, sharing characteristics of both. Focusing on the binary system WISE1049AB, I’ll share how we compare JWST data with synthetic models to uncover key details like temperature, clouds, and chemical makeup. This research helps us better understand brown dwarfs, improve future models, and refine how we classify these fascinating substellar objects.
Abstract: This project focuses on characterizing the atmospheres of L-T transitionary brown dwarfs using JWST observations and atmospheric models, specifically targeting the binary system WISE1049AB. The study aims to identify key chemical features and find the best-fit synthetic spectra for the observed JWST spectra. Using over 30,000 synthetic spectra combinations, including variables such as temperature, gravity, metallicity, and cloudiness, we employed the Sonora Diamondback Models and the SEDA (Spectral Energy Distribution Analyzer) program to determine the most accurate matches. The findings will help refine our understanding of brown dwarf atmospheres, enhance classification systems, and inform future model improvements, particularly for objects with extreme atmospheric conditions. The results highlight the necessity for better models to accurately represent substellar objects, guiding future research and observations with the JWST and other instruments