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

ATLAS – Robert Kurucz Available on-line at http://kurucz.cfa.harvard.edu/ 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 http://atmos.obspm.fr/ Good for B through G spectral classes

High Resolution Spectra from ATLAS Bertone et al. 2008, A&A, 485, 823 http://www.inaoep.mx/~modelos/bluered/bluered.html http://www.inaoep.mx/~modelos/uvblue/uvblue.html

Useful Links Simon Jeffery’s site (software, He models) http://www.arm.ac.uk/~csj/software_store/ Intensive grid: NEMO = Vienna New Model Grid of Stellar Atmospheres http://www.univie.ac.at/nemo/cgi-bin/dive.cgi POLLUX database of theoretical spectra http://pollux.graal.univ-montp2.fr/ Richard Gray’s SPECTRUM synthesis program – solves radiative transfer for input model atmosphere (runs on PC, Windows) http://www.appstate.edu/~grayro/spectrum/spectrum.html

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

PHOENIX - Hauschildt General spherical code with non-LTE models for many atoms, molecules Used for cool stars, substellar objects (with condensates + clouds) http://perso.ens-lyon.fr/france.allard/ and novae, supernovae Web sites at: http://phoenix.astro.physik.uni-goettingen.de/ http://svo2.cab.inta-csic.es/theory/newov/

PHOENIX - Hauschildt Developing spectra for GAIA mission https://www.youtube.com/watch?v=bbfb8VhH7L0

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 http://nova.astro.umd.edu/index.html

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 http://pollux.graal.univ-montp2.fr/ Web site at http://kookaburra.phyast.pitt.edu/hillier/web/CMFGEN.htm

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, 012021)

Observational Spectral Libraries Good lists (UV, optical, IR) available at http://pendientedemigracion.ucm.es/info/Astrof/invest/actividad/spectra.html Examples: ELODIE (OHP) library for high dispersion R=42000 of northern sky stars Archive contains nearly 35,000 spectra Web site at http://atlas.obs-hp.fr/elodie/

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