论文标题
IC 348
New Candidates for Planetary-mass Brown Dwarfs in IC 348
论文作者
论文摘要
我们已经使用了使用宽大摄像头3在哈勃太空望远镜上获得的红外图像来寻找星形群集群IC 348中的行星质量棕色矮小。所有这些都被确认具有较晚的类型。其中两个候选人似乎很年轻，因此可能是集群的成员，而其他两个候选人的年龄和成员不确定。以前的候选人之一是经过灭绝校正的K_S中IC 348中最淡淡的成员，预计基于进化模型的质量为4-5个木星质量，假定的年龄为3 MYR。其余八名候选人中有四个具有基于地面的光度法，可以进一步支持其作为棕色矮人的候选人资格，其中一些人比已知成员更为愚蠢（可能较少）。
We have used infrared images obtained with the Wide Field Camera 3 on board the Hubble Space Telescope to search for planetary-mass brown dwarfs in the star-forming cluster IC 348. In those images, we have identified 12 objects that have colors indicative of spectral types later than M8, corresponding to masses of <=30 Jupiter masses at the age of IC 348. The four brightest candidates have been observed with spectroscopy, all of which are confirmed to have late types. Two of those candidates appear to be young, and thus are likely members of the cluster, while the ages and membership of the other two candidates are uncertain. One of the former candidates is the faintest known member of IC 348 in extinction-corrected K_s and is expected to have a mass of 4-5 Jupiter masses based on evolutionary models and an assumed age of 3 Myr. Four of the remaining eight candidates have ground-based photometry that further supports their candidacy as brown dwarfs, some of which are fainter (and potentially less massive) than the known members.
