File formats¶

All input/output tables are plain whitespace-separated ASCII with a comment header. Paths are relative to the model folder unless noted.

Input¶

config.toml: The model configuration; see Configuration (config.toml).
Starting structure ([model] starting_model): A structure table (format), unless the value is "grey" (built-in Lucy bootstrap).
FastChem parameter file ([model] fastchem_parameter_file): FastChem’s own element-abundance / parameter file.
Opacity database ([opacity] path): The HELIOS-K cross-section folders and wavenumber_full.dat; external to the model folder.
Dust refractive indices ([dust] refractive_index_file): Complex refractive index (n, k) vs. wavelength of the dust material.

Output¶

Atmosphere structure ([output] atmosphere): Two header lines, then one row per grid point. Columns: r/R*, r(cm), rho(g/cm3), p(dyn/cm2), T_gas(K), T_dust(K), v(cm/s). The first header line also records the stellar parameters and \(\dot{M}\). This file can be fed back in as a starting model.
Spectrum ([output] spectrum): One header line, then columns: Wavelength (micron), Flux (erg s-1 cm-2 micron-1), r^2 F. The flux is the emergent (outermost-shell) astrophysical flux.
Dust ([output] dust): One header line, then per grid point: r/R*, n<H>(cm-3), Tgas(K), f_cond (degree of condensation), the carbon-species number densities n_C, n_C2, n_C2H, n_C2H2, n_d (grain number density), a_d(micron) (mean grain radius), J*(s-1 cm-3) (nucleation rate), tau_growth (growth timescale), the moments K0, K1, K2, K3, and the mean condensed volume per grain V_d(cm3).
Hydrodynamics ([output] hydro): One header line, then per grid point: r/R*, v(cm/s), c_T(cm/s) (isothermal sound speed), alpha (radiative/gravitational acceleration ratio), phi (the Melia \(\Phi\) variable).

Note

A hydro_debug.dat file may also appear in the model folder: it is an optional per-grid-point breakdown of the wind-equation terms (gravity, radiative \(\alpha\), sound-speed terms), appended whenever the critical point lands in the inner region or jumps, for diagnosing a spurious inner critical point. It is not part of the standard output and can be deleted.