Atmospheric parameters of 169 F-, G-, K- and M-type stars in the Kepler field

作者：Molenda Zakowicz J^*; Sousa S G; Frasca A; Uytterhoeven K; Briquet M; Van Winckel H; Drobek D; Niemczura E; Lampens P; Lykke J; Bloemen S; Gameiro J F; Jean C; Volpi D; Gorlova N; Mortier A; Tsantaki M; Raskin G

来源：Monthly Notices of the Royal Astronomical Society, 2013, 434(2): 1422-1434.

DOI：10.1093/mnras/stt1095

• stars: fundamental parameters
• open clusters and associations: individual: NGC 6811
• open clusters and associations: individual: NGC 6819

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.

• 出版日期2013-9