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arXiv 1712.02462astro-ph.GAastro-ph.CO
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由AKARI和Hyper Suprime-Cam揭示的宇宙恒星形成历史

Cosmic star formation history revealed by AKARI and Hyper Suprime-Cam

Tomo Goto, Nagiosa Oi, Ece Kilerci Eser, Rieko Momose, Ting-Chi Huang, Yousuke Utsumi, Hideo Matsuhara, Yoshiki Toba, Youichi Ohyama, Toshinobu Takagi, Takehiko… 展开作者

Tomo Goto, Nagiosa Oi, Ece Kilerci Eser, Rieko Momose, Ting-Chi Huang, Yousuke Utsumi, Hideo Matsuhara, Yoshiki Toba, Youichi Ohyama, Toshinobu Takagi, Takehiko Wada, Matthew Malkan, Takao Nakagawa, Seong Jin Kim, the AKARI NEP team

备注：
Proceedings of the "The Cosmic Wheel and the Legacy of the AKARI archive: from galaxies and stars to planets and life", held from October 17 - 20, 2017, Tokyo, Japan. Invited talk
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摘要：

了解红外光度是了解宇宙恒星形成历史和活动星系核演化的基础。日本的红外卫星AKARI提供了独特的数据集，在低和高红移两个波段探测这一点; AKARI全天巡天在6个波段（9-160 $μ$ m），AKARI NEP巡天在9个波段（2-24 $μ$ m）。AKARI在6个红外波段（9、18、65、90、140和160 $μ$ m）进行了所有天空调查，灵敏度比IRAS高3-10倍，覆盖了尘埃排放峰值的关键远红外波长。结合更好的空间分辨率，我们测量的总红外光度（$L_{TIR}$）的单个星系，因此，总红外光度密度的本地宇宙比以前的工作更精确。在AKARI NEP宽视场中，AKARI获得了中红外（IR）深度图像，覆盖5.4 deg $^2$。然而，我们以前的工作仅限于0.25度的中心区域的$^2$由于缺乏深的光学覆盖。为了纠正这种情况，我们使用新出现的斯巴鲁望远镜的超级超级凸轮获得整个5.4度$^2$的AKARI NEP宽领域的深光学图像。有了这个深度和广度的光学数据，我们第一次可以使用整个AKARI NEP宽数据来构建重构帧8 $μ$ m，12 $μ$ m，以及0.15 $<z<$ 2.2的总红外（TIR）光度函数（LF）。AKARI卫星在中红外波长（2.4、3.2、4.1、7、9、11、15、18和24 $μ$ m）的连续9波段滤波器覆盖范围使我们能够估计restframe 8 $μ$ m和12 $μ$ m光度，而无需使用基于SED拟合的大外推法，这是以前工作中最大的不确定性。通过结合这两个结果，我们揭示了尘埃隐藏的宇宙恒星的形成历史和活动星系核的演化，从z=0到z=2.2，所有探测的AKARI卫星。

英文摘要：

Understanding infrared (IR) luminosity is fundamental to understanding the cosmic star formation history and AGN evolution. Japanese infrared satellite, AKARI, provided unique data sets to probe this both at low and high redshift; the AKARI all sky survey in 6 bands (9-160 $μ$m), and the AKARI NEP survey in 9 bands (2-24$μ$m). The AKARI performed all sky survey in 6 IR bands (9, 18, 65, 90, 140, and 160 $μ$m) with 3-10 times better sensitivity than IRAS, covering the crucial far-IR wavelengths across the peak of the dust emission. Combined with a better spatial resolution, we measure the total infrared luminosity ($L_{TIR}$) of individual galaxies, and thus, the total infrared luminosity density of the local Universe much more precisely than previous work. In the AKARI NEP wide field, AKARI has obtained deep images in the mid-infrared (IR), covering 5.4 deg$^2$. However, our previous work was limited to the central area of 0.25 deg$^2$ due to the lack of deep optical coverage. To rectify the situation, we used the newly advent Subaru telescope's Hyper Suprime-Cam to obtain deep optical images over the entire 5.4 deg$^2$ of the AKARI NEP wide field. With this deep and wide optical data, we, for the first time, can use the entire AKARI NEP wide data to construct restframe 8$μ$m, 12$μ$m, and total infrared (TIR) luminosity functions (LFs) at 0.15$<z<$2.2. A continuous 9-band filter coverage in the mid-IR wavelength (2.4, 3.2, 4.1, 7, 9, 11, 15, 18, and 24$μ$m) by the AKARI satellite allowed us to estimate restframe 8$μ$m and 12$μ$m luminosities without using a large extrapolation based on a SED fit, which was the largest uncertainty in previous work. By combining these two results, we reveal dust-hidden cosmic star formation history and AGN evolution from z=0 to z=2.2, all probed by the AKARI satellite.

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