LAMOST Spectroscopic Survey of the Galactic Anticentre (LSS-GAC): the second release of value-added catalogues

Abstract

We present the second release of value-added catalogues of the LAMOST Spectroscopic Survey of the Galactic Anticentre (LSS-GAC DR2). The catalogues present values of radial velocity $V_{\mathrm{r}}$, atmospheric parameters --- effective temperature $T_{\mathrm{eff}}$, surface gravity log$g$, metallicity [Fe/H], $\alpha$-element to iron (metal) abundance ratio [$\alpha$/Fe] ([$\alpha$/M]), elemental abundances [C/H] and [N/H], and absolute magnitudes ${\mathrm{M}}_V$ and ${\mathrm{M}}_{K_{\mathrm{s}}}$ deduced from 1.8 million spectra of 1.4 million unique stars targeted by the LSS-GAC since September 2011 until June 2014. The catalogues also give values of interstellar reddening, distance and orbital parameters determined with a variety of techniques, as well as proper motions and multi-band photometry from the far-UV to the mid-IR collected from the literature and various surveys. Accuracies of radial velocities reach 5kms${}^{-1}$ for late-type stars, and those of distance estimates range between 10 -- 30 per cent, depending on the spectral signal-to-noise ratios. Precisions of [Fe/H], [C/H] and [N/H] estimates reach 0.1dex, and those of [$\alpha$/Fe] and [$\alpha$/M] reach 0.05dex. The large number of stars, the contiguous sky coverage, the simple yet non-trivial target selection function and the robust estimates of stellar radial velocities and atmospheric parameters, distances and elemental abundances, make the catalogues a valuable data set to study the structure and evolution of the Galaxy, especially the solar-neighbourhood and the outer disk.

27 pages, 20 figures, accepted by MNRAS

References in corpus (10)

• Astrophysics Source Code Library
• Medium-resolution Isaac Newton Telescope library of empirical spectra - II. The stellar atmospheric parameters
• The LAMOST Stellar Parameter Pipeline at Peking University --- LSP3
• LAMOST Spectroscopic Survey of the Galactic Anti-centre (LSS-GAC): target selection and the first release of value-added catalogues
• Estimating stellar atmospheric parameters, absolute magnitudes and elemental abundances from the LAMOST spectra with Kernel-based Principal Component Analysis
• Determination of the Local Standard of Rest using the LSS-GAC DR1
• A three dimensional extinction map of the Galactic Anticentre from multi-band photometry
• Probing the Galaxy's bars via the Hercules stream
• DA white dwarfs from the LSS-GAC survey DR1: the preliminary luminosity and mass functions and formation rate
• Relative Flux Calibration of the LAMOST Spectroscopic Survey of the Galactic Anti-center

Cited by in corpus (36)

• The Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) Survey Design, Reductions, and Detections
• Identical or fraternal twins? : The chemical homogeneity of wide binaries from Gaia DR2
• Overview of the LAMOST survey in the first decade
• Ages and masses of million Galactic disk main sequence turn-off and sub-giant stars from the LAMOST Galactic spectroscopic surveys
• A Unified tool to estimate Distances, Ages and Masses (UniDAM) from spectrophotometric data
• The Galactic spiral structure as revealed by O- and early B-type stars
• Mapping the Galactic disk with the LAMOST and Gaia Red clump sample: I: precise distances, masses, ages and 3D velocities of $\sim$ 140000 red clump stars
• Measuring 14 elemental abundances with R=1,800 LAMOST spectra
• Magnetic Activity of F-, G-, and K-type Stars in the LAMOST-Kepler Field
• 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
• Light Elements in the Universe
• Mapping the Galactic disk with the LAMOST and Gaia Red clump sample. VI: An evidence for the long lived non-steady warp of non-gravitational scenarios
• The white dwarf binary pathways survey - II. Radial velocities of 1453 FGK stars with white dwarf companions from LAMOST DR4
• TOI-3714 b and TOI-3629 b: Two gas giants transiting M dwarfs confirmed with HPF and NEID
• Mapping the Galactic disk with the LAMOST and $Gaia$ Red clump sample: V: On the origin of the "young" [$\alpha$/Fe]-enhanced stars
• Mapping the Galactic Disk with the LAMOST and Gaia Red Clump Sample VII: the Stellar Disk Structure Revealed by the Mono-abundance Populations
• Mapping the three-dimensional dust extinction toward the supernova remnant S147 - the S147 dust cloud
• Most "young" $\alpha$-rich stars have high masses but are actually old
• Photospheric diagnostics of core helium burning in giant stars
• Local Stellar Kinematics and Oort Constants from the LAMOST A-type Stars
• Milky Way tomography with the SkyMapper Southern Survey: I: Atmospheric parameters and distances of one million red giants
• Data-driven spectroscopic estimates of absolute magnitude, distance and binarity -- method and catalog of 16,002 O- and B-type stars from LAMOST
• TOI-3984 A b and TOI-5293 A b: two temperate gas giants transiting mid-M dwarfs in wide binary systems
• Dust in the outskirts of M31 and M33
• 12C/13C isotopic ratios in red-giant stars of the open cluster NGC 6791
• Planet Occurrence Rate Correlated to Stellar Dynamical History: Evidence from Kepler and Gaia
• Chemically peculiar A and F stars with enhanced s-process and iron-peak elements: stellar radiative acceleration at work
• Age-metallicity dependent stellar kinematics of the Milky Way disc from LAMOST and Gaia
• A Catalog of Short Period Spectroscopic and Eclipsing Binaries Identified from the LAMOST & PTF Surveys
• An in-depth exploration of LAMOST Unknown spectra based on density clustering
• The Stars of the HETDEX Survey. I. Radial Velocities and Metal-Poor Stars from Low-Resolution Stellar Spectra
• Evidence for Populations-dependent vertical motions and the Long-lived Non-Steady Lopsided Milky Way Warp
• A Combined Chandra and LAMOST Study of Stellar Activity
• The tilt of the velocity ellipsoid of different Galactic disk populations
• Discovery of Two Different Full Disk Evolutionary Patterns of M-type T Tauri Stars with LAMOST DR8
• Estimating Stellar Atmospheric Parameters and [α/Fe] for LAMOST O-M type Stars Using a Spectral Emulator