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arXiv 2006.07577astro-ph.GAastro-ph.CO
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在AKARI北极大测量场寻找没有斯巴鲁Hyper Suprime-Cam对应物的光学暗红外星系

Search for Optically Dark Infrared Galaxies without Counterparts of Subaru Hyper Suprime-Cam in the AKARI North Ecliptic Pole Wide Survey Field

Yoshiki Toba, Tomotsugu Goto, Nagisa Oi, Ting-Wen Wang, Seong Jin Kim, Simon C. -C. Ho, Denis Burgarella, Tetsuya Hashimoto, Bau-Ching Hsieh, Ting-Chi Huang, Ho… 展开作者

Yoshiki Toba, Tomotsugu Goto, Nagisa Oi, Ting-Wen Wang, Seong Jin Kim, Simon C. -C. Ho, Denis Burgarella, Tetsuya Hashimoto, Bau-Ching Hsieh, Ting-Chi Huang, Ho Seong Hwang, Hiroyuki Ikeda, Helen K. Kim, Seongjae Kim, Dongseob Lee, Matthew A. Malkan, Hideo Matsuhara, Takamitsu Miyaji, Rieko Momose, Youichi Ohyama, Shinki Oyabu, Chris Pearson, Daryl Joe D. Santos, Hyunjin Shim, Toshinobu Takagi, Yoshihiro Ueda, Yousuke Utsumi, Takehiko Wada

摘要:

我们目前的物理特性的AKARI源没有光学对应物的光学图像从超Suprime-Cam(HSC)的斯巴鲁望远镜。使用AKARI红外(IR)源目录和HSC光学目录,我们在AKARI北黄道极(NEP)宽测量场中选择了583个没有HSC对应物的物体($\sim 5$ deg $^{2}$)。由于HSC的极限星等很深($g_{\rm AB}$ $\sim 28.6$),它们是极红恒星形成星系(SFG)和/或活动星系核(AGN)的好候选者,可能在高红移。我们编译多波长数据到500 $μ$ m,并使用它的光谱能量分布(SED)与CIGALE拟合,调查的物理性质的AKARI星系没有光学对应。我们还比较了它们的物理量与AKARI中红外选定星系与HSC同行。没有HSC对应物的AKARI天体的估计红移范围高达$z\sim 4$,显著高于具有HSC对应物的AKARI天体。我们发现:(i)3.6 $-$ 4.5 $μ$ m色,(ii)活动星系核光度,(iii)恒星质量,(iv)恒星形成率,和(v)星际介质中$V$波段尘埃衰减,无HSC对应物的AKARI天体系统地大于有HSC对应物的AKARI天体。这些结果表明,我们的样本包括发光的,严重的尘埃遮蔽SFG/AGN在$z\sim 1-4$,是错过了以前的光学调查,为即将到来的詹姆斯韦伯太空望远镜时代提供了非常有趣的目标。

英文摘要:

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.

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