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ACCURACY OF LAMOST DR1 STELLAR PARAMETERS

  • GAO, HUA (Department of Astronomy, School of Physics, Peking University) ;
  • ZHANG, HUA-WEI (Department of Astronomy, School of Physics, Peking University) ;
  • XIANG, MAO-SHENG (Department of Astronomy, School of Physics, Peking University) ;
  • HUANG, YANG (Department of Astronomy, School of Physics, Peking University) ;
  • LIU, XIAO-WEI (Department of Astronomy, School of Physics, Peking University) ;
  • LUO, A-LI (National Astronomical Observatories, Chinese Academy of Sciences) ;
  • ZHANG, HAO-TONG (National Astronomical Observatories, Chinese Academy of Sciences) ;
  • WU, YUE (National Astronomical Observatories, Chinese Academy of Sciences) ;
  • ZHANG, YONG (Nanjing Institute of Astronomical Optics & Technology, National Astronomical Observatories, Chinese Academy of Sciences) ;
  • LI, GUANG-WEI (National Astronomical Observatories, Chinese Academy of Sciences) ;
  • DU, BING (National Astronomical Observatories, Chinese Academy of Sciences)
  • 투고 : 2014.11.30
  • 심사 : 2015.06.30
  • 발행 : 2015.09.30

초록

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.

키워드

참고문헌

  1. Cui, X. -Q., Zhao, Y. -H., & Chu, Y. -Q., et al., 2012, The Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST), RAA, 12, 1197
  2. Deng, L.-C., Newberg, H. J., & Liu, C., et al., 2012, LAM-OST Experiment for Galactic Understanding and Exploration (LEGUE) - The survey's science plan, RAA, 12, 735
  3. Lee, Y. S., Beers, T. C., & Sivarani, T., et al., 2008, The SEGUE Stellar Parameter Pipeline. I. Description and Comparison of Individual Methods, AJ, 136, 2022 https://doi.org/10.1088/0004-6256/136/5/2022
  4. Soubiran, C., Le Campion, J. -F., Cayrel de Strobel, G., & Caillo, A., 2010, The PASTEL Catalogue of Stellar Parameters, A&A, 515, A111 https://doi.org/10.1051/0004-6361/201014247
  5. Wu, Y., Luo, A. -L., & Li, H. -N., et al., 2011, Automatic Determination of Stellar Atmospheric Parameters and Construction of Stellar Spectral Templates of the Guoshoujing Telescope (LAMOST), RAA, 11, 924
  6. Xu, S. -Y., Zhang, H. -W., & Liu, X. -W., 2013, Extremely Metal-poor Star Candidates in the SDSS, RAA, 13, 313
  7. Zhao, G., Zhao, Y. -H., Chu, Y. -Q., Jing, Y. -P., & Deng, L. -C., 2012, LAMOST Spectral Survey - An Overview, RAA, 12, 723