Near Infrared Deep Survey for Investigation of both Dark Age of the Universe and Cosmic Reionization

为了研究宇宙早期的暗年龄和宇宙再电离，我们的目标是通过高红移的氢Lymanα发射来观测非常年轻的星系和红移z&gt；8的活动星系核。为此，我们的团队一直在为8.2米的斯巴鲁望远镜开发一种新的近红外成像仪和光谱仪；MOIRCS=多目标红外相机和光谱仪。这台仪器已经建成并开放进行开放观测。MOIRCS的视场很宽，4角x 7角。这是迄今为止用于此类8M级望远镜的最宽红外相机。考虑到斯巴鲁望远镜非常高的图像质量，MOIRCS肯定是世界上最强大和最高效的红外仪器。为了探测高度红移的氢莱曼阿尔法发射，我们制造了从1.1微米到2.3微米的新的近红外窄带滤光片。这些窄带滤光器使我们能够探测到z=9到18的莱曼阿尔法发射体。最遥远的知道L…更多的yman阿尔法发射器位于z=6.96。这个物体是通过光学窗口中的窄带滤光片测量发现的。这些非常年轻的星系的存在鼓励我们对z=7以外的莱曼阿尔法发射体进行深入调查。我们的目标领域是Goods-North和Goods-South(Goods=由哈勃太空望远镜和NASA推动的大天文台起源深度调查)。这两个区域是由哈勃太空望远镜上的高级测量相机(ACS)拍摄的。此外，许多大型望远镜设备已经在不同波长进行了后续观测，现在哈勃超深场也位于货物南部。因此，这些领域是任何近红外深度调查项目最有前途的领域。我们已经获得了货物-北方的非常深的近红外宽带图像。我们还在Goods-South获得了光学多波段滤光片图像。在Goods-South，与Isaac在智利的8.2米甚大望远镜上获得的非常深的近红外图像。因此，我们准备在斯巴鲁望远镜上使用我们新的带有MOIRCS的近红外窄带滤光片进行非常深入的成像测量。因为MOIRCS从2006年就可以使用了，但为了检查总体性能，有必要进行许多技术测试观察。因此，到今年3月，我们没有任何观察时间来使用我们新的近红外窄带滤光片。我们计划在接下来的观察学期中在斯巴鲁望远镜上使用我们的新滤镜。由于MOIRCS仍然是最好的近红外仪器，我们希望在不久的将来能够找到z=7以上的非常高红移的莱曼阿尔法发射体。较少

In order to investigate both the dark age and the cosmic reionization in early universe, we aim to observe very young galaxies and active galactic nuclei at redshift z > 8 by using highly-redshifted hydrogen Lyman alpha emission. For this purpose, our team has been developing a new near infrared imager and spectrograph for the 8.2 m Subaru Telescope; MOIRCS = Multi Object Infrared Camera and Spectrograph. This instrument has been already completed and opened for open use observations. MOIRCS has a wide field of view, 4 arcmin x 7 arcmin. This is the widest IR camera for such 8m class telescopes so far. Taking account of very high image quality of the Subaru Telescope, MOIRCS must be the most powerful and efficient IR instrument around the world.In order to detect highly redshifted hydrogen Lyman alpha emission, we have made new NIR narrowband filters from 1.1 micron to 2.3 micron. These narrowband filters allow us to detect Lyman alpha emitters from z = 9 to 18. The most distant know L … More yman alpha emitter is located at z = 6.96. This object was found by a narrowband filter survey in the optical window. The presence of such very young galaxies encourage us to make deep surveys for Lyman alpha emitters beyond z = 7.Our target fields are GOODS-North and GOODS-South (GOODS = Great Observatories Origins Deep Survey promoted by Hubble Space Telescope and NASA). These two fields have been imaged with the Advanced Camera for Surveys (ACS) on Hubble Space Telescope. Moreover, follow-up observations by many large telescope facilities at various wavelengths have been already made by now The Hubble Ultra Deep Field is also located in GOODS-South. Therefore, these fields are most promising fields for any NIR deep survey programs. We have already obtained very deep NIR broadband images of GOODS-North. We have also obtained optical multi-band filter images in GOODS-South. In the GOODS-South, very deep NIR images obtained with ISAAC on the 8.2m Very Large Telescope in Chile. Therefore, we are ready to make very deep imaging surveys with our new NIR narrowband filters with MOIRCS on the Subaru Telescope.Since the MOIRCS was ready for use since 2006, but many technical test observations were necessary to check the total performance. Therefore, we did not have any observing time to use our new NIR narrowband filters by this March. We are planning to use our new filters in the coming observation semester on the Subaru Telescope. Since MOIRCS is still the greatest NIR instrument, we hope that we will be able to find very high-redshift Lyman alpha emitters beyond z = 7 in near future. Less