Abstract
Boyd et al., (2020). SALSA: A Python Package for Constructing Synthetic Quasar Absorption Line Catalogs from Astrophysical Hydrodynamic Simulations. Journal of Open Source Software, 5(52), 2581, https://doi.org/10.21105/joss.02581
Highlights
The hot, low density gas surrounding galaxies, called the circumgalactic medium (CGM), is vital to understanding the structure and evolution of galaxies (Tumlinson, Peeples, & Werk, 2017; Voit et al, 2017)
The “Spectacle method” uses the Python package Spectacle[3] to fit Voigt profiles to the synthetic spectra generated by Trident (Earl & Peeples, 2019)
This method provides traditional absorption line information (e.g., Doppler broadening, equivalent width) and creates synthetic absorber catalogs very similar to those made from observational studies
Summary
The hot, low density gas surrounding galaxies, called the circumgalactic medium (CGM), is vital to understanding the structure and evolution of galaxies (Tumlinson, Peeples, & Werk, 2017; Voit et al, 2017). Observational astronomers conduct surveys to collect many sightlines and create large absorber catalogs that contain information about the variety of absorption lines found in each individual sightline. These catalogs create a statistical picture of the CGM and have proved invaluable in our understanding of the dynamics in the CGM. Analyses using Trident provide the opportunity to explore simulations from an observer’s perspective, which facilitates making direct comparisons to observational studies. In this way, Trident provides a new avenue of study for simulators. A straightforward, streamlined process for replicating observational absorber catalogs is not yet readily available
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