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 T eff 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 T eff 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 Developing spectra for GAIA mission Web sites at:

7 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

8 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

9 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, )

10 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

11 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