摘要
LAMOST-MRS-B is one of the sub-surveys of LAMOST medium-resolution(R~7500)spectroscopic survey.It aims at studying the statistical properties(e.g.,binary fraction,orbital period distribution,mass ratio distribution)of binary stars and exotic stars.We intend to observe about 30000 stars(10 mag≤G<14.5 mag)with at least 10 visits in five years.We first planned to observe 25 plates around the galactic plane in 2018.Then the plates were reduced to 12 in 2019 because of the limitation of observation.At the same time,two new plates located at the high galactic latitude were added to explore binary properties influenced by the different environments.In this survey project,we set the identified exotic and low-metallicity stars with the highest observation priorities.For the rest of the selected stars,we gave the higher priority to the relatively brighter stars in order to obtain high quality spectra as many as possible.Spectra of49129 stars have been obtained in LAMOST-MRS-B field and released in DR8,of which 28828 and 3375 stars have been visited more than twice and ten times with SNR≥10,respectively.Most of the sources are B-,A-,and F-type stars with-0.6<[Fe/H]<0.4 dex.We also obtain 347 identified variable and exotic stars and about 250 stars with[Fe/H]<-1 dex.We measure radial velocities(RVs)by using 892233 spectra of the stars.The uncertainties of RV achieve about 1 km·s^(-1)and 10 km·s^(-1)for 95%of late-and early-type stars,respectively.The datasets presented in this paper are available at http://www.doi.org/10.57760/sciencedb.j00113.00035.
作者
李蛟
李江丹
郭彦君
韩占文
陈雪飞
刘超
葛宏伟
姜登凯
李立芳
章博
刘佳明
田浩
张昊彤
袁海龙
崔文元
任娟娟
蔡靖豪
施建荣
Jiao Li;Jiang-Dan Li;Yan-Jun Guo;Zhan-Wen Han;Xue-Fei Chen;Chao Liu;Hong-Wei Ge;Deng-Kai Jiang;Li-Fang Li;Bo Zhang;Jia-Ming Liu;Hao Tian;Hao-Tong Zhang;Hai-Long Yuan;Wen-Yuan Cui;Juan-Juan Ren;Jing-Hao Cai;Jian-Rong Shi(Key Laboratory of Space Astronomy and Technology,National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China;Yunnan Observatories,Chinese Academy of Sciences,Kunming 650011,China;School of Astronomy and Space Science,University of Chinese Academy of Sciences,Beijing 100049,China;Key Laboratory of Optical Astronomy,National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China;Department of Physics,Hebei Normal University,Shijiazhuang 050024,China)
基金
supported by the National Natural Science Foundation of China(Grant Nos.12073070,12173081,12090043,11873016,and 12173013)
Yunnan Fundamental Research Project(Grant No.202101AV070001)
the Science Research Grants from The China Manned Space Project(Grant Nos.CMS-CSST2021-A08,CMS-CSST-2021-A10,and CMS-CSST-2021-B05)
CAS‘Light of West China’Program
Guoshoujing Telescope(the Large Sky Area MultiObject Fiber Spectroscopic Telescope LAMOST)is a National Major Scientific Project built by the Chinese Academy of Sciences.Funding for the project has been provided by the National Development and Reform Commission of China
Funding for the DPAC has been provided by national institutions,in particular the institutions participating in the Gaia Multilateral Agreement
The LAMOST fellowship is supported by Special Funding for Advanced Users,budgeted and administrated by Center for Astronomical Mega-Science,Chinese Academy of Sciences(CAMS)
supported by Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS and Special Research Assistant Program of Chinese Academy of Sciences。
