1. Resources for Stellar Atmospheres & Spectra
ATLAS Cool stars Hot stars Spectral Libraries

2. ATLAS – Robert Kurucz
Available on-line at A = tables of temperature-pressure relations for each model for a range Teff and log gravity B = Balmer line profiles for each model F = fluxes for each model I = intensities for each model; limb darkening for 17 angles
Linux source code at
Good for B through G spectral classes

3. High Resolution Spectra from ATLAS
Bertone et al. 2008, A&A, 485,

4. Useful Links
Simon Jeffery’s site (software, He models)
Intensive grid: NEMO = Vienna New Model Grid of Stellar Atmospheres
POLLUX database of theoretical spectra
Richard Gray’s SPECTRUM synthesis program – solves radiative transfer for input model atmosphere (runs on PC, Windows)

5. MARCS - Gustafsson Gustafsson et al. 2008, A&A, 486, 951
Models available at
spherically-symmetric models, using up-to-date atomic and molecular data
Good for Teff between 2500 and 8000K

6. PHOENIX - Hauschildt
General spherical code with non-LTE models for many atoms, molecules
Used for cool stars, substellar objects (with condensates + clouds) and novae, supernovae
Web sites at:

7. PHOENIX - Hauschildt
Developing spectra for GAIA mission

8. TLUSTY – Lanz & Hubeny Good for hot stars (B- and O-types)
Uses non-LTE treatment of many atoms
Plane parallel atmospheres, no treatment of stellar winds and mass loss
Accretion disk atmospheres
Web site at

9. CMFGEN - Hillier
Radiative transfer code designed to solve the radiative transfer and statistical equilibrium equations in spherical geometry
Designed for W-R stars, O stars, and Luminous Blue-Variables
Some spectra available at
Web site at

10. FASTWIND - Puls
Spherical, non-LTE, line blanketed code that treats photosphere and wind
Good for hot, luminous O-stars
Puls et al. 2005, A&A, 435, 669
No grid available yet (Simon Diaz et al. 2011, J. Phys. Conf. Ser., 328, )

11. Observational Spectral Libraries
Good lists (UV, optical, IR) available at
Examples: ELODIE (OHP) library for high dispersion R=42000 of northern sky stars
Archive contains nearly 35,000 spectra
Web site at

12. Observational Spectral Libraries
Indo-US library of coude feed stellar spectra Valdes et al. 2004, ApJS, 152, viz-bin/VizieR Select: J/ApJS/152/251