SPHINX20 SiII spectra and escape fraction data

This dataset provides synthetic rest-frame UV spectra and galaxy properties from the SPHINX20 cosmological radiation-hydrodynamics simulation for galaxies at redshift z ≥ 4.64. It includes: Low-ionization absorption line spectra for each galaxy and 10 lines of sight, specificallySi II 1260 Å and Si II 1526 Å, stored in structured JSON files. Table of line properties, such as the residual flux, the equivalent width, etc. Also contains the dust attenuation, A1500. Table of escape fractions of ionising photons, including global fesc (directional, wavelength-integrated) fesc,900, the directional escape fraction measured at 900 Å A tutorial Jupyter notebook that demonstrates how to load the spectra, extract individual sightlines, and make basic plots. These data are intended to support studies of interstellar absorption lines, UV continuum properties, and the escape of ionising radiation from high-redshift galaxies. The methodology and scientific interpretation are presented in the associated published paper, available at the following link (published in Astronomy & Astrophysics):https://www.aanda.org/articles/aa/full_html/2026/04/aa58306-25/aa58306-25.html