1 / 11

Resources for Stellar Atmospheres & Spectra

Resources for Stellar Atmospheres & Spectra. ATLAS Cool stars Hot stars Spectral Libraries. ATLAS – Robert Kurucz.

tallulah-ross
Download Presentation

Resources for Stellar Atmospheres & Spectra

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Resources forStellar Atmospheres & Spectra ATLAS Cool starsHot starsSpectral Libraries

  2. ATLAS – Robert Kurucz • Available on-line athttp://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 athttp://atmos.obspm.fr/ • Good for B through G spectral classes

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

  4. 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 Atmosphereshttp://www.univie.ac.at/nemo/cgi-bin/dive.cgi • POLLUX database of theoretical spectrahttp://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

  5. MARCS - Gustafsson • Gustafsson et al. 2008, A&A, 486, 951 • Models available athttp://marcs.astro.uu.se/ • 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)http://perso.ens-lyon.fr/france.allard/ and novae, supernovae • Developing spectra for GAIA mission • Web sites at: http://www.hs.uni-hamburg.de/EN/For/ThA/phoenix/index.html http://svo2.cab.inta-csic.es/theory/newov/

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

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

  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, 012021)

  10. Observational Spectral Libraries • Good lists (UV, optical, IR) available athttp://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/

  11. Observational Spectral Libraries • Indo-US library of coude feed stellar spectraValdes et al. 2004, ApJS, 152, 251http://vizier.u-strasbg.fr/viz-bin/VizieRSelect:J/ApJS/152/251

More Related