• Title/Summary/Keyword: astronomical physics

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ACCURACY OF LAMOST DR1 STELLAR PARAMETERS

  • GAO, HUA;ZHANG, HUA-WEI;XIANG, MAO-SHENG;HUANG, YANG;LIU, XIAO-WEI;LUO, A-LI;ZHANG, HAO-TONG;WU, YUE;ZHANG, YONG;LI, GUANG-WEI;DU, BING
    • Publications of The Korean Astronomical Society
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    • v.30 no.2
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    • pp.279-281
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    • 2015
  • We adopt the PASTEL catalog combined with SIMBAD radial velocities as a testing standard to validate the stellar parameters (effective temperature $T_{eff}$, surface gravity log g, metallicity [Fe/H] and radial velocity $V_r$) from the first data release (DR1) of The Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) survey. After applying data reduction and temperature constraints to the sample obtained by cross-identification, we compare the stellar parameters from DR1 and PASTEL. The results show that the DR1 results are reliable under certain conditions. We derive a dispersion of 110 K, 0.19 dex, 0.11 dex and $4.91kms^{-1}$ in specified effective temperature ranges, for $T_{eff}$, log g, [Fe/H] and $V_r$ respectively. Systematic errors are negligible except for those of $V_r$. In addition, for stars with PASTEL [Fe/H] < -1:5, the metallicities in DR1 are systematically higher than those in PASTEL.