J/A+A/575/A89ivo://CDS.VizieR/J/A+A/575/A89doi:10.26093/cds/vizier.35750089CDSKostogryz N.M.Berdyugina S.V.2015-07-26T21:33:47Z2015-03-02T08:05:49ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frastronomical-modelsstellar-atmospherespolarimetrylate-type-starsScattering and absorption processes in stellar atmosphere act the center-to-limb variations of the intensity (CLVI) and the linear polarization (CLVP) of stellar radiation. There are several theoretical and observational studies of CLVI using different stellar models, however, most studies of CLVP have concentrated on the solar atmosphere and have not considered the CLVP in cooler non-gray stellar atmospheres at all. In this paper, we present a theoretical study of the CLV of the intensity and the linear polarization in continuum spectra of different spectral type stars. We solve the radiative transfer equations for polarized light iteratively assuming no magnetic field and considering a planeparallel model atmospheres and various opacities.2015A&A...575A..89Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/575/A89CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/AJ/106/2096 : Limb-darkening coefficients in binaries (Van Hamme 1993)J/A+A/510/A21 : Stellar Limb-Darkening Coefficients (Sing, 2010)J/A+A/529/A75 : Limb-darkening coefficients (Claret+, 2011)J/A+A/546/A14 : Limb-darkening for CoRoT, Kepler, Spitzer (Claret+, 2012)J/A+A/552/A16 : Limb-darkening for CoRoT, Kepler, Spitzer. II. (Claret+, 2013)J/ApJ/766/3 : Limb-darkening coefficients for eclipsing WD (Gianninas+ 2013)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/575/A89https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/575/A89http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/575/A89https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/575/A89https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/575/A89http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/575/A89GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/575/A89/table1Calculated center-to-limb variation of intensity for different stellar parametersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambda[4000/7000] Wavelength ({AA})0.1nmem.wlintTeff[4500/6900] Effective temperatureKphys.temperature.effectiveintlogg[3/5] Surface gravitylog(cm.s**-2)phys.gravityfloatPlotPlot the limb-darkening profile for the specified Teff, loggmeta.ref.urlcharLD10[0/1] Limb darkening at {mu}=0.10, I({mu})/I(1.0)phot.limbDarkfloatLD15[0/1] Limb darkening at {mu}=0.15, I({mu})/I(1.0)phot.limbDarkfloatLD20[0/1] Limb darkening at {mu}=0.20, I({mu})/I(1.0)phot.limbDarkfloatLD25[0/1] Limb darkening at {mu}=0.25, I({mu})/I(1.0)phot.limbDarkfloatLD30[0/1] Limb darkening at {mu}=0.30, I({mu})/I(1.0)phot.limbDarkfloatLD35[0/1] Limb darkening at {mu}=0.35, I({mu})/I(1.0)phot.limbDarkfloatLD40[0/1] Limb darkening at {mu}=0.40, I({mu})/I(1.0)phot.limbDarkfloatLD50[0/1] Limb darkening at {mu}=0.50, I({mu})/I(1.0)phot.limbDarkfloatLD70[0/1] Limb darkening at {mu}=0.70, I({mu})/I(1.0)phot.limbDarkfloatLD90[0/1] Limb darkening at {mu}=0.90, I({mu})/I(1.0)phot.limbDarkfloatJ/A+A/575/A89/table2Calculated center-to-limb variation of linear polarization for different stellar parametersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambda[4000/7000] Wavelength ({AA})0.1nmem.wlintTeff[4500/6900] Effective temperatureKphys.temperature.effectiveintlogg[3/5] Surface gravitylog(cm.s**-2)phys.gravityfloatPlotPlot the limb-darkening profile for the specified Teff, loggmeta.ref.urlcharNS10[0/0.025] Normalized Stokes parameter Q/I at {mu}=0.1, Q({mu})/I({mu})phys.polarization.stokesdoubleNS15[0/0.016] Normalized Stokes parameter Q/I at {mu}=0.15, Q({mu})/I({mu})phys.polarization.stokesdoubleNS20[0/0.011] Normalized Stokes parameter Q/I at {mu}=0.2, Q({mu})/I({mu})phys.polarization.stokesdoubleNS25[0/0.01] Normalized Stokes parameter Q/I at {mu}=0.25, Q({mu})/I({mu})phys.polarization.stokesdoubleNS30[0/0.006] Normalized Stokes parameter Q/I at {mu}=0.3, Q({mu})/I({mu})phys.polarization.stokesdoubleNS35[0/0.006] Normalized Stokes parameter Q/I at {mu}=0.35, Q({mu})/I({mu})phys.polarization.stokesdoubleNS40[0/0.005] Normalized Stokes parameter Q/I at {mu}=0.4, Q({mu})/I({mu})phys.polarization.stokesdoubleNS50[0/0.003] Normalized Stokes parameter Q/I at {mu}=0.5, Q({mu})/I({mu})phys.polarization.stokesdoubleNS70[0/0.001] Normalized Stokes parameter Q/I at {mu}=0.7, Q({mu})/I({mu})phys.polarization.stokesdoubleNS90[0/0.001] Normalized Stokes parameter Q/I at {mu}=0.9, Q({mu})/I({mu})phys.polarization.stokesdoubleJ/A+A/575/A89/table3Coefficients of polynomial fits of calculated limb darkening curves for different stellar parametersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambda[4000/7000] Wavelength {lamdba} ({AA})0.1nmem.wlintTeff[4500/6900] Effective temperatureKphys.temperature.effectiveintlogg[3/5] Surface gravitylog(cm.s**-2)phys.gravityfloata1[0.08/0.4] 1st polynomial coefficient a_1_ (1)meta.notefloata2[-0.4/0.6] 2nd polynomial coefficient a_2_ (1)meta.notefloata3[0.1/2.0] 3d polynomial coefficient a_2_ (1)meta.notefloata4[-1/0.2] 4th polynomial coefficient a_4_ (1)meta.notefloatsigma[0/0.000355] Deviation error of calculated CLVI from polynomial fitted curvesstat.stdevdouble