论文标题
来自拉斯维加斯调查的IC1459组的超弥漫性星系
Ultra Diffuse Galaxies in the IC1459 Group from the VEGAS Survey
论文作者
论文摘要
使用Vegas调查中的Deep G，R，I成像，我们在IC 1459组中搜索了超弥漫星系（UDGS）。假设他们是小组成员，我们确定了9个具有物理大小和表面亮度的星系，这些星系符合我们的测量不确定性中的UDG标准。它们的含义为g - i = 0.6和$ \ sim $ 10 $^8 $ m $ _ {\ odot} $的恒星质量。几个星系似乎具有相关对象的相关系统，例如球状簇。两个UDG包含一个中央明亮的核，第三个UDG揭示了一个显着的双核。这似乎是在UDG中首次报道的对双核的检测 - 目前尚不清楚其起源。
Using deep g,r,i imaging from the VEGAS survey, we have searched for ultra diffuse galaxies (UDGs) in the IC 1459 group. Assuming they are group members, we identify 9 galaxies with physical sizes and surface brightnesses that match the UDG criteria within our measurement uncertainties. They have mean colours of g--i = 0.6 and stellar masses of $\sim$10$^8$ M$_{\odot}$. Several galaxies appear to have associated systems of compact objects, e.g. globular clusters. Two UDGs contain a central bright nucleus, with a third UDG revealing a remarkable double nucleus. This appears to be the first reported detection of a double nucleus in a UDG - its origin is currently unclear.
