Multi-Wavelength Data over the NEP Field of AKARI: New Data-Merging Based on the Deep Optical Imaging by HSC

Seong-Jin Kim^1*, Nagisa Oi², Tomotsugu Goto¹, Hiroyuki Ikeda³, Hideo Matsuhara⁴, Chien-Chang Ho¹, Matthew Malkan⁵, Ting-Wen Wang¹, Hyunjin Shim⁶, Chris Pearson^7,8, Tetsuya Hashimoto¹, Rieko Momose⁹

¹Institute of astronomy, National Tsing Hua University, Hsinchu, Taiwan
²Tokyo University of Science, Tokyo, Japan
³National Astronomical Observatory of Japan, Mitaka, Tokyo, Japan
⁴Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara, Kanagawa, Japan
⁵Department of Physics and astronomy, UCLA, L.A., CA, USA
⁶Department of Earth Science Education, Kyungpook National Univerwity, Daegu, Korea
⁷RAL Space, Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire, UK
⁸The Open University, Milton Keynes, UK
⁹Department of Astronomy, School of Science, The University of Tokyo, Hongo, Bunkyo, Tokoy, Japan

* Presenter:Seong-Jin Kim, email:seongini@gmail.com

The north ecliptic pole (NEP) field has been a stronghold of extragalactic sciences, having been targeted especially since it was surveyed by the AKARI space telescope with its unique wavelength coverage in the mid-infrared (IR). Many follow-up observations have been carried out and made this field one of the most frequently observed areas using a variety of facilities, which have accumulated multi-wavelength data sets from ultraviolet (UV) to sub-mm range. A recent deep optical survey with the Hyper Suprime-Cam (HSC) at the Subaru telescope covered this NEP field, and it enabled us to identify more sources fainter at the optical to IR bands, which made it possible to finally improve the photometric redshift estimation. In this work, we present multi-bands photometric properties of the AKARI IR sources identified by the HSC over the NEP-Wide field, as well as a new band-merged catalog containing various information from the UV (where available) to the sub-millimeter (sub-mm, the Herschel/SPIRE) bands. This catalog will be useful when we ring in the new era of the NEP, where the future space telescopes (such as JWST, Euclid, SPHEREx, eROSITA, and SPICA) are actually planning to take deep field observations. In the presentation, some of the newly identified AKARI sources by the HSC observation will be presented and discussed.

Keywords: data analysis, catalog, infrared