Spitzer observations of sigma Orionis

We report new Spitzer Space Telescope observations, using the IRAC and MIPS instruments, of the young (~3Myr) sigma Orionis cluster. We identify 336 stars as members of the...本研究报道了针对年龄约3百万年的猎户座σ星团（σ Orionis cluster）开展的全新斯皮策空间望远镜（Spitzer Space Telescope）观测，观测所用仪器为红外阵列相机（IRAC，Infrared Array Camera）与多波段成像光度计（MIPS，Multiband Imaging Photometer for Spitzer），并甄别出336颗该星团的成员星……