SPCANet: Stellar Parameters and Chemical Abundances Network for LAMOST-II Medium Resolution Survey
Wang, Rui ; Luo, A. -Li ; Chen, Jian-Jun ; Hou, Wen ; Zhang, Shuo ; Zhao, Yong-Heng ; Li, Xiang-Ru ; Hou, Yong-Hui ; LAMOST MRS Collaboration
The fundamental stellar atmospheric parameters (Teff and log g) and 13 chemical abundances are derived for medium-resolution spectroscopy from Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) Medium Resolution Survey (MRS) data sets with a deep-learning method. The neural networks we designed, named SPCANet, precisely map LAMOST MRS spectra to stellar parameters and chemical abundances. The stellar labels derived by SPCANet have precisions of 119 K for Teff and 0.17 dex for log g. The abundance precision of 11 elements including [C/H], [N/H], [O/H], [Mg/H], [Al/H], [Si/H], [S/H], [Ca/H], [Ti/H], [Cr/H], [Fe/H], and [Ni/H] are 0.06 ∼ 0.12 dex, while that of [Cu/H] is 0.19 dex. These precisions can be reached even for spectra with signal-to-noise ratios as low as 10. The results of SPCANet are consistent with those from other surveys such as APOGEE, GALAH, and RAVE, and are also validated with the previous literature values including clusters and field stars. The catalog of the estimated parameters is available at doi:10.12149/101012.
Files
.. MRS_parameters_elements.csv
478MB
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Paper Information
Paper Title:
SPCANet: Stellar Parameters and Chemical Abundances Network for LAMOST-II Medium Resolution Survey
Publication:
The Astrophysical Journal
Bibcode:
2020ApJ...891...23W
DOI:
10.3847/1538-4357/ab6dea
Identifiers
DOI:
10.12149/101013
VO Identifier:
ivo://China-VO/paperdata/101013
Publication Date:
2020-01-10
Citation Guidelines
Wang, Rui et al. 2020. SPCANet: Stellar Parameters and Chemical Abundances Network for LAMOST-II Medium Resolution Survey. Version 1.0. https://doi.org/10.12149/101013
@misc{10.12149/101013,
doi = {10.12149/101013},
url = {https://doi.org/10.12149/101013},
author = {Wang, Rui},
title = {SPCANet: Stellar Parameters and Chemical Abundances Network for LAMOST-II Medium Resolution Survey},
version = {1.0},
publisher = {Nataional Astronomical Data Center of China},
year= {2020}
}
Versions
Version 1.0 (current)
2020-01-10
Main
This DOI represents all versions, and will always resolve to the latest one.
2020-01-10