Spitzer observations of stars in M33

We analyze five epochs of Spitzer Space Telescope Infrared Array Camera (IRAC) observations of the nearby spiral galaxy M33. Each epoch covered nearly a square degree at 3.6,...我们对邻近旋涡星系M33的斯皮策空间望远镜（Spitzer Space Telescope）红外阵列相机（Infrared Array Camera, IRAC）五次观测数据展开分析。每次观测时段在3.6……波段覆盖了近1平方度的天区。