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Determinations of high-precision effective temperatures for giants based on spectroscopic criteria

hal.structure.identifierOdessa Astronomical Observatory
dc.contributor.authorKOVTYUKH, V. V.
hal.structure.identifierOdessa Astronomical Observatory
dc.contributor.authorMISHENINA, T. V.
hal.structure.identifierOdessa Astronomical Observatory
dc.contributor.authorGORBANEVA, T. I.
hal.structure.identifierObservatoire astronomique de Strasbourg [ObAS]
dc.contributor.authorBIENAYMÉ, O.
hal.structure.identifierLaboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
hal.structure.identifierObservatoire aquitain des sciences de l'univers [OASU]
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
dc.contributor.authorSOUBIRAN, C.
hal.structure.identifierOdessa Astronomical Observatory
dc.contributor.authorKANTSEN, E. L.
dc.date.issued2006
dc.description.abstractEnSpectral lines with high and low excitation potentials respond differently to changes of the effective temperature (T eff), making the ratio of their depths (or equivalent widths) a very sensitive temperature indicator. We derive a set of 100 equations relating T eff to the line-depth ratios, calibrated against accurate (to within 1%) published temperature determinations for giants. These relations are used to determine very accurate temperatures for a sample of 110 giants with nearly solar metallicities based on high-resolution (R = 42 000) échelle spectra with high signal-to-noise ratios (SNRs). The calibration relations are valid for temperatures of 4000–7000 K (F2III–K4III). The internal errors of each of the calibration relations are below 95 K, and applying all these relations together to spectra with SNR = 100 reduces the errors to 5–25 K (1 ?). A major advantage of this technique is that it is independent from interstellar reddening, spectroscopic resolution, and line broadening due to rotation and microturbulence.
dc.language.isoen
dc.title.enDeterminations of high-precision effective temperatures for giants based on spectroscopic criteria
dc.typeArticle de revue
dc.identifier.doi10.1134/S1063772906020065
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Cosmologie et astrophysique extra-galactique [astro-ph.CO]
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]
bordeaux.journalAstronomy reports (Astronomicheskii Zhurnal)
bordeaux.page134-142
bordeaux.volume50-2
bordeaux.peerReviewedoui
hal.identifierhal-00023197
hal.version1
hal.popularnon
hal.audienceNon spécifiée
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00023197v1
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