title: [A Method to Estimate Metal Abundance from Stellar Spectra Using Ca Line Index].
abstract: This paper presents a method to estimate stellar metallicity based on BP neural network and Ca line index. This method trains a BP ANN model from SDSS/SEGUE stellar spectra and parameters provided by SSPP. The values of Teff and the line index of Ca lines are the input of network while the [Fe/H] values are the oputput of the network. A set of samples are resampled from the set of all and then a network model is trained. The network can be used to predict the stellar metallicity from low-resolution spsectra. The experiment shows that the proposed method can accurately and effectively measure the [Fe/H] from the stellar spectra.
authors.forename: Jing-chang
authors.initials: JC
authors.lastname: Pan
authors.forename: A-li
authors.initials: AL
authors.lastname: Luo
authors.forename: Xiang-ru
authors.initials: XR
authors.lastname: Li
authors.forename: Peng
authors.initials: P
authors.lastname: Wei