Deep HST/UVIS imaging of the candidate dark galaxy CDG-1
arxiv(2024)
摘要
CDG-1 is a tight grouping of four likely globular clusters in the Perseus
cluster, and a candidate dark galaxy with little or no diffuse light. Here we
provide new constraints on the luminosity of any underlying stellar emission,
using HST/UVIS F200LP imaging. No diffuse emission is detected, with a
2σ upper limit of F200LP>28.1 mag/arcsec^2 on the 5” scale of CDG-1.
This surface brightness limit corresponds to a 2σ lower limit of >0.5
for the fraction of the total luminosity that is in the form of globular
clusters. The most likely alternative, although improbable, is that CDG-1 is a
chance grouping of four globular clusters in the halo of the Perseus galaxy
IC312.
更多查看译文
AI 理解论文
溯源树
样例
![](https://originalfileserver.aminer.cn/sys/aminer/pubs/mrt_preview.jpeg)
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要