Updated data files for the tabulated MESA equation of state in the Phantom SPH code (including Entropy tables for the General Relativistic Module)
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These tables are automatically downloaded from this repository when running Phantom Two sets of MESA equation of state tables are provided for use with the PHANTOM SPH code. The routines required to read these tables are included in PHANTOM (src/main/eos_mesa.f90). Descriptions of output_DE tables: These tables are based on the MESA equation of state module (Paxton et al. 2011) and follow the same format and parameterisation as the tables previously provided in Zenodo record 13148447. The original PHANTOM implementation and table format were described in Price et al. (2018), with the previous tables generated by Reichardt et al. (2020). The updated tables were generated using a newer version of MESA (mesa-24.08.1). The underlying EOS physics is unchanged, but some regions of the tabulated EOS have changed between MESA versions, motivating the creation of this updated set of tables. The tables were generated using the MESA eosDT_get routine combined with a bisection solver to determine temperature. The tabulated variables are functions of specific internal energy and the transformed density variable used in the original PHANTOM tables. Values outside the physical EOS range (above full degeneracy) are filled with a constant value to avoid extrapolation into non-physical regions. The tabulated variables cover the same ranges as the original PHANTOM tables:-10 ≤ log V ≤ 12 and 10 ≤ log u ≤ 17,where u is the specific internal energy and log V = log ρ − 0.7 log u + 20. Descriptions of output_rhos tables: These tables are generated from the same MESA EOS data but are intended for use with the general relativistic module of PHANTOM, where entropy is evolved instead of internal energy. Unlike the standard EOS tables, these tables are tabulated as functions of entropy and density rather than internal energy and the transformed density variable. Only the quantities required by the GR module are stored:log P, log u, log T, and Γ1.



