LSS-GAC - A LAMOST Spectroscopic Survey of the Galactic Anti-center

Abstract

As a major component of the LAMOST Galactic surveys, the LAMOST Spectroscopic Survey of the Galactic Anti-center (LSS-GAC) will survey a significant volume of the Galactic thin/thick disks and halo in a contiguous sky area of ~ 3,400sq.deg., centered on the Galactic anti-center (|b| <= 30°, 150 <= l <= 210°), and obtain λλ3800--9000 low resolution (R ~ 1,800) spectra for a statistically complete sample of >= 3M stars of all colors, uniformly and randomly selected from (r, g - r) and (r, r - i) Hess diagrams obtained from a CCD imaging photometric survey of ~ 5,400sq.deg. with the Xuyi 1.04/1.20 m Schmidt Telescope, ranging from r = 14.0 to a limiting magnitude of r = 17.8 (18.5 for limited fields). The survey will deliver spectral classification, radial velocity Vr and stellar parameters (effective temperature Teff, surface gravity log g and metallicity [Fe/H]) for millions of Galactic stars. Together with Gaia which will provide accurate distances and tangential velocities for a billion stars, the LSS-GAC will yield a unique dataset to study the stellar populations, chemical composition, kinematics and structure of the disks and their interface with the halo, identify streams of debris of tidally disrupted dwarf galaxies and clusters, probe the gravitational potential and dark matter distribution, map the 3D distribution of interstellar dust extinction, search for rare objects (e.g. extremely metal-poor or hyper-velocity stars), and ultimately advance our understanding of the assemblage of the Milky Way and other galaxies and the origin of regularity and diversity of their properties. ... (abridged)

12 pages, 7 figures, to appear in Proceedings of the IAU Symposium No. 298 "Setting the Scene for Gaia and LAMOST"

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• The Radial Velocity Experiment (RAVE): first data release
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Cited by in corpus (29)

• Red giants observed by CoRoT and APOGEE: The evolution of the Milky Way's radial metallicity gradient
• Updating the MACHO fraction of the Milky Way dark halo with improved mass models
• Empirical temperature- and extinction-dependent extinction coefficients for the GALEX, Pan-STARRS1, Gaia, SDSS, 2MASS, and WISE passbands
• The value-added catalogue for LAMOST DR8 low-resolution spectra
• White dwarf-main sequence binaries from LAMOST: the DR5 catalogue
• Planets Across Space and Time (PAST). I. Characterizing the Memberships of Galactic Components and Stellar Ages: Revisiting the Kinematic Methods and Applying to Planet Host Stars
• Mapping the Galactic disk with the LAMOST and Gaia Red clump sample. II. 3D asymmetrical kinematics of mono-age populations in the disk between 6$-14$ \,kpc
• Time stamps of vertical phase mixing in the Galactic disk from LAMOST-Gaia stars
• J-PLUS: Stellar Parameters, C, N, Mg, Ca and [α/Fe] Abundances for Two Million Stars from DR1
• Most "young" $\alpha$-rich stars have high masses but are actually old
• Local Stellar Kinematics and Oort Constants from the LAMOST A-type Stars
• Probing the Galactic Halo with RR Lyrae Stars. II. The Substructures of the Milky Way
• RR Lyrae in XSTPS: The halo density profile in the North Galactic Cap
• An all-sky 3D dust map Based on Gaia and LAMOST
• The formation and survival of the Milky Way's oldest stellar disk
• Correction to the photometric colors of the Gaia Data Release 2 with the stellar color regression method
• Validation and Improvement of the Pan-STARRS Photometric Calibration with the Stellar Color Regression Method
• Mapping the Galactic disk with the LAMOST and Gaia Red clump sample: III: A new velocity substructure and time stamps of the Galactic disk asymmetry in the disk between 12$-$15 \,kpc
• Photometric recalibration of the SDSS Stripe 82 to a few milimagnitude precision with the stellar color regression method and Gaia EDR3
• Age-metallicity dependent stellar kinematics of the Milky Way disc from LAMOST and Gaia
• Metallicity of Galactic RR Lyrae from Optical and Infrared Light Curves: II. Period-Fourier-Metallicity Relations for First Overtone RR Lyrae
• A spatially dependent correction of Gaia EDR3 parallax zero-point offset based on 0.3 million LAMOST DR8 giant stars
• Photometric calibration of the Stellar Abundance and Galactic Evolution Survey (SAGES): Nanshan One-meter Wide-field Telescope g, r, and i band imaging data
• Homogeneous Stellar Atmospheric Parameters and 22 Elemental Abundances for FGK Stars Derived From LAMOST Low-resolution Spectra with DD-Payne
• Reliable stellar abundances of individual stars with the MUSE integral-field spectrograph
• Spectroscopic study of Herbig Ae/Be stars in the Galactic Anti-center region from LAMOST DR5
• A Comprehensive All-Sky Catalog of 3345 Molecular Clouds from Three-dimensional Dust Extinction
• Estimating accurate reddening values of LAMOST M dwarfs
• Revisiting the Radial Metallicity Gradient-Age Relation in the Milky Way's Thin and Thick Disks