论文标题
在Akari North Ecliptic Pole宽的调查场中搜索没有Subaru Hyper Suprime-CAM的光学深红外星系
Search for Optically Dark Infrared Galaxies without Counterparts of Subaru Hyper Suprime-Cam in the AKARI North Ecliptic Pole Wide Survey Field
论文作者
论文摘要
我们介绍了Akari源的物理特性，而没有光学图像中来自Subaru望远镜上的超弹力板（HSC）的光学图像。使用Akari红外（IR）源目录和HSC光学目录，我们选择了583个物体，这些对象在Akari North Ecliptic Pole（NEP）宽的调查字段（$ \ sim 5 $ deg $^$^{2} $）中没有HSC对应物。由于HSC的限制幅度很深（$ g _ {\ rm ab} $ $ \ sim 28.6 $），因此这些是极端红色星形的星系（SFGS）和/或主动银河核（AGNS）的好候选者，可能在高红移。我们将多波长数据汇编为500 $ $ m，并将其用于光谱能量分布（SED）拟合CIGALE，以研究没有光学对应物的Akari星系的物理特性。我们还将其物理量与Akari Mid-IR选定的星系与HSC对应物进行了比较。没有HSC对应物的Akari对象的估计红移范围高达$ z \ sim 4 $，显着高于具有HSC对应物的Akari对象。我们发现：（i）3.6 $ - $ 4.5 $ m $ m颜色，（ii）agn光度，（iii）恒星质量，（iv）星形形成率，（v）$ v $ -v $ - 频带尘埃衰减在没有HSC对象的Akari Interstellar媒介中，没有HSC对象是与Akari counterparts的系统中更大的。这些结果表明，我们的样本包括$ z \ sim 1-4 $的发光，大量尘埃刺激的SFGS/AGN，这些SFG/AGN被先前的光学调查所遗漏，为即将到来的James Webb Space望远镜时代提供了非常有趣的目标。
We present the physical properties of AKARI sources without optical counterparts in optical images from the Hyper Suprime-Cam (HSC) on the Subaru telescope. Using the AKARI infrared (IR) source catalog and HSC optical catalog, we select 583 objects that do not have HSC counterparts in the AKARI North Ecliptic Pole (NEP) wide survey field ($\sim 5$ deg$^{2}$). Because the HSC limiting magnitude is deep ($g_{\rm AB}$ $\sim 28.6$), these are good candidates for extremely red star-forming galaxies (SFGs) and/or active galactic nuclei (AGNs), possibly at high redshifts. We compile multi-wavelength data out to 500 $μ$m and use it for Spectral Energy Distribution (SED) fitting with CIGALE to investigate the physical properties of AKARI galaxies without optical counterparts. We also compare their physical quantities with AKARI mid-IR selected galaxies with HSC counterparts. The estimated redshifts of AKARI objects without HSC counterparts range up to $z\sim 4$, significantly higher than that of AKARI objects with HSC counterparts. We find that: (i) 3.6 $-$ 4.5 $μ$m color, (ii) AGN luminosity, (iii) stellar mass, (iv) star formation rate, and (v) $V$-band dust attenuation in the interstellar medium of AKARI objects without HSC counterparts are systematically larger than those of AKARI objects with counterparts. These results suggest that our sample includes luminous, heavily dust-obscured SFGs/AGNs at $z\sim 1-4$ that are missed by previous optical surveys, providing very interesting targets for the coming James Webb Space Telescope era.
