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Overview of the LAMOST-Kepler project

Research in Astronomy and Astrophysics 2020年第10期20卷 343-352页

作者： Jian-Ning Fu Peter De Cat Weikai Zong Antonio Frasca Richard O.Gray An-Bin Ren Joanna Molenda-Zakowicz Christopher J.Corbally Giovanni Catanzaro Jian-Rong Shi A-Li Luo Hao-Tong Zhang Department of Astronomy Beijing Normal UniversityBeijing 100875China Royal Observatory of Belgium Ringlaan 3B-1180 BrusselBelgium INAF-Osservatorio Astrofisico di Catania Via S.Sofia 781-95123 CataniaItaly Department of Physics and Astronomy Appalachian State UniversityBooneNC 28608USA Department of Astronomy China West Normal UniversityNanchong 637002China Astronomical Institute of the University of Wroclaw ul.Kopernika 1151-622 WroclawPoland Vatican Observatory Research Group University of ArizonaTucsonAZ 85721-0065USA Key Lab for Optical Astronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China

The NASA Kepler mission obtained long-term high-quality photometric observations for a large number of stars in its original field of view from 2009 to *** provide reliable stellar parameters in a homogeneous way,the LAMOST telescope began to carry out low-resolution spectroscopic observations for as many stars as possible in the Kepler field in *** June 2018,238386 low-resolution spectra with SNRg≥6 had been collected for 155623 stars in the Kepler field,enabling the determination of atmospheric parameters and radial velocities,as well as spectral classification of the target *** information has been used by astronomers to carry out research in various fields,including stellar pulsations and asteroseismology,exoplanets,stellar magnetic activity and flares,peculiar stars and the Milky Way,binary stars,*** summarize the research progress in these fields where the usage of data from the LAMOST-Kepler(LK)project has played a *** addition,time-domain medium-resolution spectroscopic observations have been carried out for about 12000 stars in four central plates of the Kepler field since *** currently available results show that the LAMOST-Kepler medium resolution(LKMRS)observations provide qualified data suitable for research in additional science projects including binaries,high-amplitude pulsating stars,*** LAMOST is continuing to collect both low-and mediumresolution spectra of stars in the Kepler field,we expect more data to be released continuously and new scientific results to appear based on the LK project data.

关键词： astronomical database:miscellaneous technique:spectroscopy stars:general stars:statistics

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Radial velocity measurements from LAMOST medium-resolution spectroscopic observations: a pointing towards the Kepler field

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Research in Astronomy and Astrophysics 2019年第5期19卷 133-140页

作者： Nian Liu Jian-Ning Fu Weikai Zong Jian-Rong Shi A-Li Luo Hao-Tong Zhang Xiang-Qun Cui Yong-Hui Hou Yang Pan Xin-Rui Shan Jian-Jun Chen Zhong-Rui Bai Jian-Xing Chen Bing Du Wen Hou Yu-Chen Liu Hao Tian Jiang-Tao Wang Jia-Xin Wang Ke-Fei Wu Yu-Zhong Wu Hong-Liang Yan Fang Zuo Department of Astronomy Beijing Normal University Key Lab for Optical Astronomy National Astronomical Observatories Chinese Academy of Sciences School of Astronomy and Space Science University of Chinese Academy of Sciences Nanjing Institute of Astronomical Optics & Technology National Astronomical Observatories Chinese Academy of Sciences

Radial velocity is one of the key measurements in understanding the fundamental properties of stars, stellar clusters and the Galaxy. A plate of stars in the Kepler field was observed in May of 2018 with the medium-resolution spectrographs of LAMOST, aiming to test the performance of this new system which is the upgraded equipment of LAMOST after the first five-year regular survey. We present our analysis on the radial velocity measurements(RVs) derived from these data. The results show that slight and significant systematic errors exist among the RVs obtained from the spectra collected by different spectrographs and exposures, respectively. After correcting the systematic errors with different techniques, the precision of RVs reaches ～1.3,～1.0,～0.5 and ～0.3 km s^(-1) at S/Nr = 10, 20, 50 and 100, respectively. Comparing with the RVs of standard stars from the APOGEE survey, our RVs are calibrated with a zero-point shift of～7 km s^(-1). The results indicate that the LAMOST medium-resolution spectroscopic system may provide RVs with a reasonable accuracy and precision for the selected targets.

关键词： technique:spectroscopy stars:radial velocity stars:statistics

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