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J/other/RAA/11.924  Atmospheric parameters for 771 stars             (Wu+, 2011)

Automatic Determination of Stellar Atmospheric Parameters and Construction of Stellar Spectral Templates of the Guoshoujing Telescope (LAMOST). Wu Y., Luo A.L., Li H.N., Shi J.R., Prugniel P., Liang Y.C., Zhao Y.H., Zhang J.N., Bai Z.R., Wei P., Dong W.X., Zhang H.T., Chen J.J. <Res. Astron. Astrophys., 11, 924 (2011)> =2011RAA....11..924W
ADC_Keywords: Stars, atmospheres ; Atlases ; Effective temperatures ; Abundances, [Fe/H] Keywords: stars: fundamental parameters - galaxies: stellar content Abstract: A number of spectroscopic surveys have been carried out or are planned to study the origin of the Milky Way. Their exploitation requires reliable automated methods and softwares to measure the fundamental parameters of the stars. Adopting the ULySS package, we have tested the effect of different resolutions and signal-to-noise ratios (SNR) on the measurement of the stellar atmospheric parameters (effective temperature Teff, surface gravity logg, and metallicity [Fe/H]). We show that ULySS is reliable to determine these parameters with medium-resolution spectra (R∼2000). Then, we applied the method to measure the parameters of 771 stars selected in the commissioning database of the Guoshoujing Telescope (GSJT). The results were compared with the SDSS/SEGUE Stellar Parameter Pipeline (SSPP), and we derived precisions of 167K, 0.34dex, and 0.16dex for Teff, logg and [Fe/H] respectively. Furthermore, 120 of these stars are selected to construct the primary stellar spectra template library (Version 1.0) of GSJT, and will be deployed as basic ingredients for the GSJT automated parametrization pipeline. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table.dat 79 771 Physical parameters adopted by this work
See also: III/251 : ELODIE library V3.1 (Prugniel+ 2007) J/A+A/525/A71 : Atmospheric parameters for 1273 stars (Wu+, 2011) J/ApJS/152/251 : Indo-US Library of Coude Feed Stellar Spectra (Valdes+, 2004) : Indo-US library of coude feed stellar spectra : ULySS software package home page : ELODIE home page Byte-by-byte Description of file: table.dat
Bytes Format Units Label Explanations
1- 2 I2 --- Sp [1/15] No. of the spectrograph 5- 7 I3 --- Fib Fiber ID number 10- 20 F11.7 deg RAdeg Right ascension in decimal degrees (J2000) 23- 32 F10.7 deg DEdeg Declination in decimal degrees (J2000) 35- 39 F5.2 --- Rmag R magnitude from SuperCOSMOS catalog (1) 42- 46 I5 K Teff Effective temperature 49- 51 I3 K e_Teff Error of effective temperature (2) 54- 57 F4.2 [cm/s2] log(g) Log of the surface gravity 60- 63 F4.2 [cm/s2] e_log(g) Error of the log of the surface gravity (2) 66- 70 F5.2 [Sun] [Fe/H] Metallicity 73- 76 F4.2 [Sun] e_[Fe/H] Error of metallicity (2) 79 I1 --- Flag [0/1] Indication of whether chosen as a template (3)
Note (1): Optical R magnitude from SuperCOSMOS source catalog, photographic photometry, optical R band between 600 and 750nm. Note (2): The internal errors returned by ULySS. Note (3): A flag indicates that if the spectrum was selected as a member of the stellar spectra template library as follows: 0 = not a member of the library 1 = a member of the library
Acknowledgements: Yue Wu, wmoon211(at)
(End) Yue Wu [NAOC, China], Patricia Vannier [CDS] 09-Jun-2011
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