{sigma} Orionis cluster stellar population

We present a spectroscopic survey of the stellar population of the {sigma} Orionis cluster. We have obtained spectral types for 340 stars. Spectroscopic data for spectral typing...本文针对猎户座σ（Sigma Orionis cluster）星团的恒星族群（stellar population）开展了光谱巡天（spectroscopic survey）研究。我们已为340颗恒星测定了光谱型（spectral types）。用于光谱型分类的光谱数据……