Phase II of the LAMOST-Kepler/K2 Survey. I. Time Series of Medium-resolution Spectroscopic Observations
Phase II of the LAMOST-Kepler/K2 Survey. I. Time Series of Medium-resolution Spectroscopic Observations
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LAMOST-开普勒/K2 巡天的第二阶段。
DOI：
10.3847/1538-4365/abbb2d
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发表时间：
2020-09
期刊：
影响因子：
--
通讯作者：
Hongliang
中科院分区：
文献类型：
--
作者：
Weikai Zong;Jian-Ning Fu;Peter De Cat;Jiaxin Wang;Jianrong Shi;Ali Luo;Haotong Zhang;A. Frasca;J. Molenda-Żakowicz;R. O. Gray;C. J. Corbally;G. Catanzaro;Tianqi Cang;Jiangtao Wang;Jianjun Chen;Yonghui Hou;Jiaming Liu;Hubiao Niu;Yang Pan;Hao Tian;Hongliang
抽象。大天区多目标光纤光谱望远镜（LAMOST）-开普勒/K2巡天（LK-MRS）的第二阶段于2018年启动，旨在收集5年内（2018年9月至2023年6月）超过50，000颗恒星的中分辨率光谱（R ≥ 7500;以下称为MRS）。我们选择了20个足迹分布在开普勒领域和六个K2运动，每个板块包含一些恒星，从2000到3000不等。在第一年的观测中，LK-MRS已经在40个夜晚访问了13个板块223次，并分别在蓝色和红色波长范围内收集了280，000和369，000个高质量光谱。利用LAMOST恒星参数管道成功地计算了21,053个目标的259,000个光谱的大气参数和径向速度。有效温度、表面重力、金属丰度和径向速度的内部不确定度分别为100 K、0.15 dex、0.09 dex和1.00 km s−1，当从g波段信噪比（S/N）为10的中等分辨率LAMOST光谱中导出时。所有的不确定度都随着S/N的增加而减小，但当S/N>100时，它们趋于稳定。我们分别发现了14，997、20，091和1514颗恒星与LAMOST低分辨率巡天（LRS）、盖亚和阿帕奇点天文台银河演化实验（APOGEE）的目标相同，分别对应于70%、95%和7.2%的分数。从LK-MRS谱得到的参数与LRS谱和APOGEE谱得到的参数基本一致，但与APOGEE谱相比，随着地表重力的减小，散射增大。发现一个很大的差异与盖亚值的有效温度。LK-MRS与盖亚和APOGEE的径向速度比较接近高斯分布，平均值分别为μ π ι 1.10和0.73 km s−1。我们期望LK-MRS光谱的结果将为双星、星震学、恒星活动和其他研究领域提供新的线索。
Abstract. Phase II of the Large Sky Area Multi-Object Fibre Spectroscopic Telescope (LAMOST)-Kepler/K2 survey (LK–MRS), initiated in 2018, aims at collecting medium-resolution spectra (R∼7500; hereafter MRS) for more than 50,000 stars with multiple visits (∼60 epochs) over a period of 5 yr (2018 September to 2023 June). We selected 20 footprints distributed across the Kepler field and six K2 campaigns, with each plate containing a number of stars ranging from ∼2000 to ∼3000. During the first year of observations, the LK–MRS has already visited 13 plates 223 times over 40 individual nights, and collected ∼280,000 and ∼369,000 high-quality spectra in the blue and red wavelength ranges, respectively. The atmospheric parameters and radial velocities for ∼259,000 spectra of 21,053 targets were successfully calculated by the LAMOST stellar parameter pipeline. The internal uncertainties for the effective temperature, surface gravity, metallicity, and radial velocity are found to be 100 K, 0.15 dex, 0.09 dex, and 1.00 km s−1, respectively, when derived from a medium-resolution LAMOST spectrum with a signal-to-noise ratio (S/N) in the g band of 10. All of the uncertainties decrease as S/N increases, but they stabilize for S/N>100. We found 14,997, 20,091, and 1514 stars in common with the targets from the LAMOST low-resolution survey (LRS), Gaia, and the Apache Point Observatory Galactic Evolution Experiment (APOGEE), respectively, corresponding to fractions of ∼70%, ∼95%, and ∼7.2%. In general, the parameters derived from LK–MRS spectra are consistent with those obtained from the LRS and APOGEE spectra, but the scatter increases as the surface gravity decreases when comparing with the measurements from APOGEE. A large discrepancy is found with the Gaia values of the effective temperature. Comparisons of the radial velocities of LK–MRS to Gaia and LK–MRS to APOGEE nearly follow a Gaussian distribution with means of μ∼1.10 and 0.73 km s−1, respectively. We expect that the results from the LK–MRS spectra will shed new light on binary stars, asteroseismology, stellar activity, and other research fields.
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LAMOST望远镜揭示，热木星的海王星表亲大多是富含重元素的恒星的单一后代
DOI：
10.1073/pnas.1711406115
发表时间：
2017-06
影响因子：
11.1
作者：
Dong Subo;Xie Ji-Wei;Zhou Ji-Lin;Zheng Zheng;Luo Ali
通讯作者：
Luo Ali
开普勒场中的 LAMOST 观测。
DOI：
10.3847/1538-4365/aadf81
发表时间：
2018-10
期刊：
Astrophysical Journal, The - Supplement Series
影响因子：
--
作者：
Zong Weikai;Fu Jian-Ning;De Cat Peter;Shi Jianrong;Luo Ali;Zhang Haotong;Frasca A.;Corbally C. J.;Molenda-akowicz J.;Catanzaro G.;Gray R. O.;Wang Jiangtao;Pan Yang;Ren Anbing;Zhang Ruyuan;Jin Mengqi;Wu Yue;Dong Subo;Xie Ji-Wei;Zhang Wei;Hou Yonghui;LAMOST
通讯作者：
LAMOST
影响因子：
3.5
作者：
G. Walker;J. Matthews;R. Kuschnig;R. Johnson;S. Rucinski;J. Pazder;G. Burley;A. Walker;K. Skaret;R. Zee;S. Grocott;K. Carroll;P. Sinclair;D. Sturgeon;J. Harron
通讯作者：
G. Walker;J. Matthews;R. Kuschnig;R. Johnson;S. Rucinski;J. Pazder;G. Burley;A. Walker;K. Skaret;R. Zee;S. Grocott;K. Carroll;P. Sinclair;D. Sturgeon;J. Harron
DOI：
10.1111/j.1949-8594.1953.tb06864.x
发表时间：
1996
期刊：
--
影响因子：
--
作者：
P. Benson;D. Elmegreen
通讯作者：
P. Benson;D. Elmegreen
影响因子：
4.8
作者：
Z. F. Bostancı;T. Ak;T. Yontan;S. Bilir;T. Guver;S. Ak;O. Cakirli;O. Ozdarcan;E. Paunzen
通讯作者：
Z. F. Bostancı;T. Ak;T. Yontan;S. Bilir;T. Guver;S. Ak;O. Cakirli;O. Ozdarcan;E. Paunzen