Invited Presentation

Author(s): Tomo Goto (NTHU), and the AKARI NEP team

Presenter: Tomo Goto (NTHU)

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 $\mu$m), and the AKARI NEP survey in 9 bands (2-24$\mu$m).

The AKARI performed all sky survey in 6 IR bands (9, 18, 65, 90,
140, and 160 $\mu$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$\mu$m, 12$\mu$m, and total infrared (TIR) luminosity
functions (LFs) at 0.15$