期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 434, 期 2, 页码 1422-1434出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stt1095
关键词
stars: fundamental parameters; open clusters and associations: individual: NGC 6811; open clusters and associations: individual: NGC 6819
资金
- Polish MNiSW [N N203 405139]
- Polish National Science Centre [2011/01/N/ST9/00400]
- Italian Ministero dell'Istruzione, Universita e Ricerca (MIUR)
- European Research Council/European Community [239953]
- Fundacao para a Ciencia e a Tecnologia (FCT) [SFRH/BPD/47611/2008, PTDC/CTE-AST/098528/2008, PTDC/CTE-AST/098754/2008]
- Cooperacao Cientifica e Tecnologica FCT/Polonia [Proc. 441.00 Polonia]
- FCT/MCTES, Portugal
- POPH/FSE (EC)
- European Research Council under European Community [227224]
- Spanish National Plan of RD [AYA2010-17803]
- Fundação para a Ciência e a Tecnologia [PTDC/CTE-AST/098754/2008] Funding Source: FCT
The asteroseismic and planetary studies, like all research related to stars, need precise and accurate stellar atmospheric parameters as input. We aim at deriving the effective temperature (T-eff), the surface gravity (log g), the metallicity ([Fe/H]), the projected rotational velocity (v sin i) and the MK type for 169 F-, G-, K- and M-type Kepler targets which were observed spectroscopically from the ground with five different instruments. We use two different spectroscopic methods to analyse 189 high-resolution, high-signal-to-noise spectra acquired for the 169 stars. For 67 stars, the spectroscopic atmospheric parameters are derived for the first time. KIC 9693187 and 11179629 are discovered to be double-lined spectroscopic binary systems. The results obtained for those stars for which independent determinations of the atmospheric parameters are available in the literature are used for a comparative analysis. As a result, we show that for solar-type stars the accuracy of present determinations of atmospheric parameters is +/- 150 K in T-eff, +/- 0.15 dex in [Fe/H] and +/- 0.3 dex in log g. Finally, we confirm that the curve-of-growth analysis and the method of spectral synthesis yield systematically different atmospheric parameters when they are applied to stars hotter than 6000 K.
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