NGC 2547 4.5-8um photometry

We have surveyed the 30Myr old cluster NGC 2547 for planetary debris disks using Spitzer. At 4.5-8um we are sensitive to the photospheric level down to mid-M stars (0.2M_{sun}),...我们利用斯皮策空间望远镜(Spitzer)，对年龄达30百万年的星团NGC 2547开展了行星碎屑盘(planetary debris disks)搜寻巡天观测。在4.5至8微米波段下，我们的探测灵敏度可覆盖至0.2倍太阳质量的M型中期恒星的光球层辐射水平。