POSTER P912: Bayesian non-LTE gas temperature estimation of cores in the CMZ using Julia

ADASS posters are displayed all week

When

10:12 p.m., Nov. 9, 2023

Theme: Other creative topics in astronomical software

pretalxeposter

We present a new single-zone, non-LTE radiative transfer code, Jadex (https://github.com/autocorr/Jadex.jl), for estimating the gas kinetic temperature and volume densities of molecular clouds. The software is written in the Julia programming language and numerically optimized for the repeated likelihood evaluations needed for Bayesian parameter estimation using Markov-Chain Monte Carlo methods. As a demonstration, we estimate gas kinetic temperatures of dense cores detected in CMZoom, the SMA survey of the Milky Way's Central Molecular Zoom (CMZ), using the three K-doublet transitions of formaldehyde near 218 GHz. We report initial results from a comparison of the measured temperatures to core evolutionary states. Finally, we assess Julia's suitability for moderate size applications in numerical computing for astronomy.

Contacts

Brian Svoboda, NRAO