LAMOST observations in the Kepler field. Analysis of the stellar parameters measured with the LASP based on the low-resolution spectra

摘要: All of the 14 subfields Kepler field have been observed at least once with Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST, Xinglong Observatory, China) during 2012-2014 observation seasons. There are 88,628 reduced spectra SNR$_g$ (signal-to-noise ratio in g band) $\geq$ 6 after first round (2012-2014) observations for LAMOST-Kepler project (LK-project). By adopting upgraded version LAMOST Stellar Parameter pipeline (LASP), we determined atmospheric parameters ($T_{\rm eff}$ , $\log g$, and $\rm [Fe/H]$) heliocentric radial velocity $v_{\rm rad}$ 51,406 stars 61,226 spectra. Compared derived from both high-resolution spectroscopy asteroseismology method common Huber et al. (2014), an external calibration LASP was made, leading to determination errors giants dwarfs, respectively. Multiple spectroscopic same objects LK-project were used estimate internal uncertainties as a function unbiased estimation method. The calibrated based on A general statistical analysis stellar leads discovery 106 candidate metal-poor stars, 9 very 18 high-velocity stars. Fitting formulae obtained segmentally KIC velocities will be useful studying field.