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Reddenings of FGK supergiants and classical Cepheids from spectroscopic data

hal.structure.identifierAstronomical observatory of Odessa National University [Odessa]
hal.structure.identifierOdessa Astronomical Observatory
dc.contributor.authorKOVTYUKH, V. V.
hal.structure.identifierM2A 2008
dc.contributor.authorSOUBIRAN, C.
hal.structure.identifierDepartment of Astronomy, Case Western Reserve University,
dc.contributor.authorLUCK, R. E.
hal.structure.identifierForest Science Department
dc.contributor.authorTURNER, David G.
hal.structure.identifierOdessa Astronomical Observatory
dc.contributor.authorBELIK, S. I.
hal.structure.identifierGalaxies, Etoiles, Physique, Instrumentation [GEPI]
hal.structure.identifierAstronomical observatory of Odessa National University [Odessa]
dc.contributor.authorANDRIEVSKY, S. M.
hal.structure.identifierAstronomical observatory of Odessa National University [Odessa]
dc.contributor.authorCHEKHONADSKIKH, F. A.
dc.date.created2008
dc.date.issued2008
dc.identifier.issn0035-8711
dc.description.abstractEnAccurate and homogeneous atmospheric parameters (Teff, log (g), Vt, [Fe/H]) are derived for 74 FGK non-variable supergiants from high-resolution, high signal-to-noise ratio, echelle spectra. Extremely high precision for the inferred effective temperatures (10-40 K) is achieved by using the line-depth ratio method. The new data are combined with atmospheric values for 164 classical Cepheids, observed at 675 different pulsation phases, taken from our previously published studies. The derived values are correlated with unreddened B-V colours compiled from the literature for the investigated stars in order to obtain an empirical relationship of the form: (B-V)o = 57.984 - 10.3587(log Teff)^2 + 1.67572(log Teff)^3 - 3.356(log (g)) + 0.0321(Vt) + 0.2615[Fe/H] + 0.8833((log (g))(log Teff)). The expression is used to estimate colour excesses E(B-V) for individual supergiants and classical Cepheids, with a precision of +-0.05 mag. for supergiants and Cepheids with n=1-2 spectra, reaching +-0.025 mag. for Cepheids with n>2 spectra, matching uncertainties for the most sophisticated photometric techniques. The reddening scale is also a close match to the system of space reddenings for Cepheids. The application range is for spectral types F0--K0 and luminosity classes I and II.
dc.language.isoen
dc.publisherOxford University Press (OUP): Policy P - Oxford Open Option A
dc.subject.enstars: fundamental parameters
dc.subject.ensupergiants
dc.subject.enCepheids
dc.title.enReddenings of FGK supergiants and classical Cepheids from spectroscopic data
dc.typeArticle de revue
dc.identifier.doi10.1111/j.1365-2966.2008.13644.x
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Cosmologie et astrophysique extra-galactique [astro-ph.CO]
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]
dc.identifier.arxiv0807.2057
bordeaux.journalMonthly Notices of the Royal Astronomical Society
bordeaux.page1336-1344
bordeaux.volume389
bordeaux.peerReviewedoui
hal.identifierhal-00324084
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00324084v1
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