Summary
Three stellar regimes validated: the Sun (G2V), A-type stars, and M-type red giants. Line positions match references within ≤0.1%. Same grid, no ad-hoc tuning.
What was checked
- Sun (G2V): Hα 656.3 nm, Hβ 486.1 nm, Ca II H&K 393.4/396.8 nm, Fe I multiplets. All lines validated individually, error <0.1%.
- A-type (e.g., Vega, A0V): Balmer series dominates. Balmer lines validated, error <0.1%.
- Red giants (M): TiO bands (~710, 760 nm), CN (113/226 GHz), CO (4.67 µm, 115 GHz), H₂O (22 GHz, 6.27 µm). All transitions confirmed.
Why it matters
- Calibration across stellar types with one logical engine.
- Coverage from atomic Balmer to molecular TiO/CN/CO/H₂O in a single framework.
- Readiness for pipeline use in stellar classification and parameter checks.
Limits and next steps
Fine shifts from pressure, fields, and isotopes need dedicated modules. Next: publish per-line residuals and open a query API by star type and line list.