Resources for Stellar Atmospheres Spectra ATLAS Cool stars

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

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 2

High Resolution Spectra from ATLAS • Bertone et al. 2008, A&A, 485, 823 http: //www. inaoep. mx/~modelos/bluered. html http: //www. inaoep. mx/~modelos/uvblue. html 3

Spectrum Synthesis: Atmosphere + Line List to Spectrum • Bob Kurucz’ SYNTHE http: //kurucz. harvard. edu/programs. html • Chris Sneden’s MOOG https: //www. as. utexas. edu/~chris/moog. html • Jeff Valenti’s Spectroscopy Made Easy http: //www. stsci. edu/~valenti/sme. html • Richard Gray’s SPECTRUM http: //www. appstate. edu/~grayro/spectrum. html • Ian Czekala’s Starfish https: //github. com/iancze/Starfish 4

Links for Atmospheres and Synthetic Spectra • David Montes’ wonderful collection: http: //webs. ucm. es/info/Astrof/invest/actividad/spectra. html • Intensive grid of ATLAS 9 models: 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-montp 2. fr/ 5

Model Cool Stars 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 8000 K 6

Model Cool Stars 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: //svo 2. cab. inta-csic. es/theory/newov/ 7

Model Hot Stars 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 8

Model Hot Stars CMFGEN – John 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-montp 2. fr/ • Grid soon: Fierro-Santillan et al. 2018, Ap. JS, 236, 38 • Web site at http: //kookaburra. phyast. pitt. edu/hillier/web/CMFGEN. htm 9

Model Hot Stars FASTWIND – Jo 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) 10

Model Hot Stars: POWR Potsdam Wolf-Rayet Models – Wolf-Rainer Hamann • Designed for extensive mass loss stars, WR and OB types • http: //www. astro. physik. unipotsdam. de/~wrh/Po. WR/powrgrid 1. php 11

Observational Spectral Libraries • Excellent lists (UV, optical, IR) available at David Montes’ web site http: //webs. 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/ 12

Observational Spectral Libraries • Indo-US library of coude feed stellar spectra Valdes et al. 2004, Ap. JS, 152, 251 https: //www. noao. edu/cflib/ 13

Ultraviolet Spectra • IUE archive https: //archive. stsci. edu/iue/ • HST archive https: //archive. stsci. edu/hst/ 10 Lac 14