2024/07/01 by Jupiter Ding, Benjamin Horowitz, Zarija Lukić · 1 citation
Earth and Planetary Sciences · Engineering · #Algorithm #Computational Fluid Dynamics and Aerodynamics #Computer graphics (images) #Computer science #Fluid Dynamics and Turbulent Flows #Meteorological Phenomena and Simulations #Scalable Vector Graphics #World Wide Web
paper · pdf · doi:10.1016/j.ascom.2024.100858
openalex publication_date 2024/07/01 · openalex created_date 2024/07/21 · openalex updated_date 2026/07/28
We introduce the Python program THALAS (TensorFlow Hydrodynamics Analysis for Lyman-Alpha Simulations), which maps baryon fields (baryon density, temperature, and velocity) to Lyα optical depth fields in both real space and redshift space. Unlike previous Lyα codes, THALAS is fully differentiable, enabling a wide variety of potential applications for general analysis of hydrodynamical simulations and cosmological inference. To demonstrate THALAS's capabilities, we apply it to the Lyα forest inversion problem: given a Lyα optical depth field, we reconstruct the corresponding real-space dark matter density field. Such applications are relevant to both cosmological and three-dimensional tomographic analyses of Lyman Alpha forest data.