LAMOST Experiment for Galactic Understanding and Exploration (LEGUE) The survey science plan

Abstract

We describe the current plans for a spectroscopic survey of millions of stars in the Milky Way galaxy using the Guo Shou Jing Telescope (GSJT, formerly the Large Area Multi-Object Spectroscopic Telescope - LAMOST). The survey will obtain spectra for 2.5 million stars brighter than $r<19$ during dark/grey time, and 5 million stars brighter than $r<17$ or $J<16$ on nights that are moonlit or have low transparency. The survey will begin in fall of 2012, and will run for at least four years. The telescope design constrains the optimal declination range for observations to $10^{\circ }<\delta <50^{\circ }$, and site conditions lead to an emphasis on stars in the direction of the Galactic anticenter. The survey is divided into three parts with different target selection strategies: disk, anticenter, and spheroid. The resulting dataset will be used to study the merger history of the Milky Way, the substructure and evolution of the disks, the nature of the first generation of stars through identification of the lowest metallicity stars, and star formation through study of open clusters and the OB associations. Detailed design of the LEGUE survey will be completed after a review of the results of the pilot survey in summer 2012.

19 pages, 1 figure, accepted for publication in RAA

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• Automatic line selection for abundance determination in large stellar spectroscopic surveys
• The role of radial migration on tracing lithium evolution in the Galactic disk
• Possible evidence of hydrogen emission in the first-overtone and multi-mode RR Lyrae variables
• The white-light superflares from cool stars in GWAC triggers
• Probing the Galactic halo with RR Lyrae stars -- IV. On the Oosterhoff dichotomy of RR Lyrae stars
• Spectroscopic study of Herbig Ae/Be stars in the Galactic Anti-center region from LAMOST DR5
• Mapping the Milky Way's stellar halo with 2D data
• Discovery of a Metal-Poor Red Giant Star with the Highest Ultra-Lithium Enhancement
• Exploring Be phenomena in OBA stars: a Mid-infrared search
• The binary fraction of Blue Horizontal-Branch (BHB) Stars
• A Catalog of 12,766 Carbon-enhanced Metal-poor Stars from LAMOST Data Release 8
• Kinematic-Chemical analysis and Time tagging for the Diagonal Ridge Structure of the Galactic Outer Disk with LAMOST Red Giant Branch Stars
• The Milky Way in context: The formation of galactic discs and chemical sequences from a cosmological perspective
• On the Metallicity Gradient in the Galactic Disk
• Galactic cartography with SkyMapper: I. Population sub-structure and the stellar number density of the inner halo
• Satellite galaxies as better tracers of the Milky Way halo mass
• Galactic Stellar Populations from Photometric Metallicity Distribution Functions
• Fixing the Reference Frame for PPMXL Proper Motions Using Extragalactic Sources
• Measuring the Diffuse Interstellar Bands at 5780, 5797, and 6614 Å in Low-Resolution Spectra of Cool Stars from LAMOST
• Chemical tagging with APOGEE, MUSE, and HST: constraints on the formation of $\omega$ Centauri
• Extremely Metal-Poor Star Candidates in the SDSS
• Estimating accurate reddening values of LAMOST M dwarfs
• X-ray Activity from Different Types of Stars
• Survey of Surveys. II. Stellar parameters for 23 millions of stars
• Period-Luminosity-Metallicity-Color Relations of Late-type Contact Binaries in the Big Data Era
• Spectroscopically Identified Cataclysmic Variables from LAMOST survey. I. The Sample
• Nearly 30,000 late-type main-sequence stars with stellar age from LAMOST DR5
• The Relative Calibration of Radial Velocity for LAMOST Medium Resolution Stellar Spectra
• Discovery of Two Different Full Disk Evolutionary Patterns of M-type T Tauri Stars with LAMOST DR8
• The Binary Fraction of B-type Runaway Stars from LAMOST DR8
• The Stellar Spectra Factory (SSF) Based On SLAM
• Star formation in the circumgalactic high-velocity cloud Complex H
• The Survey of Surveys: machine learning for stellar parametrization
• Blueshifted hydrogen emission and shock wave of RR Lyrae variables in SDSS and LAMOST
• The origin of B-type runaway stars based on kinematics
• Revisiting the Radial Metallicity Gradient-Age Relation in the Milky Way's Thin and Thick Disks
• New tidal debris nearby the Sagittarius leading tail from the LAMOST DR2 M giant stars
• The metal-poor tail of the APOGEE survey I. Uncovering [Fe/H] < -2.5 stars from the inner Galaxy to the Magellanic Clouds
• Metallicity estimation of RR Lyrae stars from their I-band light curves
• Gaia DR3 high radial velocity stars: Genuine fast-moving objects or outliers?
• SDSS-IV MaStar: Determination of Stellar Parameters Using Bayesian Averaging
• Correlation between the two-armed $V_R$ spiral in the $Z$--$V_Z$ plane and moving groups
• Estimating stellar atmospheric parameters and elemental abundances using fully connected residual network
• Refined M-type Star Catalog from LAMOST DR10: Measurements of Radial Velocities, $T_{\text{eff}}$, log $g$, [M/H] and [$\alpha$/M]
• Three Models of the Gravitational Potential of the Milky Way
• Dynamical Models of the Milky Way in Action Space with LAMOST DR8 and GAIA EDR3
• A hybrid SLAM-Payne framework for atmospheric parameter and abundance determination of early-type Stars from LAMOST DR9 low-resolution Spectra
• J-PLUS: Searching for very metal-poor star candidates using the SPEEM pipeline
• Zeta-Payne: a fully automated spectrum analysis algorithm for the Milky Way Mapper program of the SDSS-V survey
• J-PLUS: Systematic impact of metallicity on photometric calibration with the stellar locus
• Distribution functions for spheroids