Vol 21, No 4

LAMOST Medium-Resolution Spectral Survey of Galactic Nebulae (LAMOST MRS-N): An overview of scientific goals and survey plan

Chao-Jian Wu, Hong Wu, Wei Zhang, Juan-Juan Ren, Jian-Jun Chen, Chih-Hao Hsia, Yu-Zhong Wu, Hui Zhu, Bin Li, Yong-Hui Hou, Jun-Lin Wang, Shuo-Ran Yu, LAMOST MRS Collaboration


Abstract Since Sep. 2018, LAMOST has started the medium-resolution (R ∼ 7500) spectral survey (MRS). We proposed the spectral survey of Galactic nebulae, including H II regions, HH objects, supernova remnants, planetary nebulae and the special stars with MRS (LAMOST MRS-N). LAMOST MRS-N covers about 1700 square degrees of the northern Galactic plane within \(40^{\circ} < l < 215^{\circ}\) and \(−5^{\circ} < b < 5^{\circ}\). In this 5-year survey, we plan to observe about 500 thousand nebulae spectra. According to the commissioning observations, the nebulae spectra can provide precise radial velocity with uncertainty less than 1 km s\(^{−1}\). These high-precision spectral data are of great significance to our understanding of star formation and evolution.


Keywords surveys — ISM: general — ISM: HII regions — ISM: Herbig-Haro objects — ISM: planetary nebulae: — ISM: supernova remnants — Galaxy: disk

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