HIGH PRECISION EFFECTIVE TEMPERATURES OF F-K SUPERGIANTS AND CLASSICAL CEPHEIDS

HIGH PRECISION EFFECTIVE TEMPERATURES OF F-K SUPERGIANTS AND CLASSICAL CEPHEIDS

We present precise effective temperatures (Teff) of 110 F-K supergiants determined from the method of line depth ratios. For each star, we have measured the line depths a large number of spectral lines of low and high excitation potentials and established ~ 100 relations between Teff and their r...

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Main Author: V. V. Kovtyukh
Format: Article
Language:English
Published: Odessa I. I. Mechnykov National University 2017-04-01
Series:Odessa Astronomical Publications
Online Access:http://oap.onu.edu.ua/article/view/98254
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spelling doaj-f114713ccd8e48c3aa85690900eac4ab2020-11-25T02:32:48ZengOdessa I. I. Mechnykov National UniversityOdessa Astronomical Publications1810-42152017-04-01180707310.18524/1810-4215.2005.18.9825498254HIGH PRECISION EFFECTIVE TEMPERATURES OF F-K SUPERGIANTS AND CLASSICAL CEPHEIDSV. V. Kovtyukh0Astronomical Observatory of Odessa National University Marazlievskaya, 1v 65014 Odessa, UkraineWe present precise effective temperatures (Teff) of 110 F-K supergiants determined from the method of line depth ratios. For each star, we have measured the line depths a large number of spectral lines of low and high excitation potentials and established ~ 100 relations between Teff and their ratios. These relations have been calibrated against previously published accurate temperature estimates. The range of application of the method is 4000-7000 K (F2-K4). The internal error for a single calibration is less than 110 K, while the combination of all 100 calibrations reduces the uncertainty to only 5-35 K (1 sigma). A big advantage of the line ratio method is its independence on interstellar reddening, spectral resolution, and line broadening due to rotation or microturbulence.http://oap.onu.edu.ua/article/view/98254
collection DOAJ
language English
format Article
sources DOAJ
author V. V. Kovtyukh
spellingShingle V. V. Kovtyukh
HIGH PRECISION EFFECTIVE TEMPERATURES OF F-K SUPERGIANTS AND CLASSICAL CEPHEIDS
Odessa Astronomical Publications
author_facet V. V. Kovtyukh
author_sort V. V. Kovtyukh
title HIGH PRECISION EFFECTIVE TEMPERATURES OF F-K SUPERGIANTS AND CLASSICAL CEPHEIDS
title_short HIGH PRECISION EFFECTIVE TEMPERATURES OF F-K SUPERGIANTS AND CLASSICAL CEPHEIDS
title_full HIGH PRECISION EFFECTIVE TEMPERATURES OF F-K SUPERGIANTS AND CLASSICAL CEPHEIDS
title_fullStr HIGH PRECISION EFFECTIVE TEMPERATURES OF F-K SUPERGIANTS AND CLASSICAL CEPHEIDS
title_full_unstemmed HIGH PRECISION EFFECTIVE TEMPERATURES OF F-K SUPERGIANTS AND CLASSICAL CEPHEIDS
title_sort high precision effective temperatures of f-k supergiants and classical cepheids
publisher Odessa I. I. Mechnykov National University
series Odessa Astronomical Publications
issn 1810-4215
publishDate 2017-04-01
description We present precise effective temperatures (Teff) of 110 F-K supergiants determined from the method of line depth ratios. For each star, we have measured the line depths a large number of spectral lines of low and high excitation potentials and established ~ 100 relations between Teff and their ratios. These relations have been calibrated against previously published accurate temperature estimates. The range of application of the method is 4000-7000 K (F2-K4). The internal error for a single calibration is less than 110 K, while the combination of all 100 calibrations reduces the uncertainty to only 5-35 K (1 sigma). A big advantage of the line ratio method is its independence on interstellar reddening, spectral resolution, and line broadening due to rotation or microturbulence.
url http://oap.onu.edu.ua/article/view/98254
work_keys_str_mv AT vvkovtyukh highprecisioneffectivetemperaturesoffksupergiantsandclassicalcepheids
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