论文标题
深色星系候选人Agesvc1的深度光学成像282
Deep optical imaging of the dark galaxy candidate AGESVC1 282
论文作者
论文摘要
盲人HI调查Arecibo Galaxy环境调查（AGES）检测到处女座群集中的几个未解决的来源，在斯隆数字天空调查中没有光学对应物。这些乌云的起源未知。它们可能是至关重要的物体，因为它们可能是所谓的深色星系，即，宇宙学模拟所期望的没有明星含量的暗物质光环。为了揭示乌云的性质，我们拍摄了其中一个人的深度光学图像，Agesvc1 282，新委托的140万Milanković望远镜。在$ l $ filter中观察10.4h之后，该图像达到了$ V $中的29.1 mag arcsec $^{ - 2} $的表面亮度极限。未检测到光学对应物。我们对$ 1.1 \ times10^7 \，l_ \ odot $的对象的$ v $ -band光度放大了上限，在3.1上以上3.1。通过检查周围区域的存档HI观察结果，我们发现光学深色HI云的标准说明都不适合该对象上的可用约束。
The blind HI survey Arecibo Galaxy Environment Survey (AGES) detected several unresolved sources in the Virgo cluster, which do not have optical counterparts in the Sloan Digital Sky Survey. The origin of these dark clouds is unknown. They might be crucial objects since they could be the so-called dark galaxies, that is, the dark matter halos without stellar content that are expected from cosmological simulations. In order to reveal the nature of the dark clouds, we took a deep optical image of one them, AGESVC1 282, with the newly-commissioned 1.4m Milanković Telescope. After observing it for 10.4h in the $L$-filter, the image reached a surface-brightness limit of about 29.1 mag arcsec$^{-2}$ in $V$. No optical counterpart was detected. We placed an upper limit on the $V$-band luminosity of the object of $1.1\times10^7\,L_\odot$, giving a stellar mass below $1.4\times10^7\,M_\odot$ and a HI-to-stellar mass ratio above 3.1. By inspecting archival HI observations of the surrounding region, we found that none of the standard explanations for optically dark HI clouds fits the available constraints on this object.
