English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The $AKARI$ space infrared telescope has performed near- to mid-infrared(MIR) observations on the North Ecliptic Pole Wide (NEPW) field (5.4 deg$^2$)for about one year. $AKARI$ took advantage of its continuous nine photometricbands, compared with NASA's $Spitzer$ and WISE space telescopes, which had onlyfour filters with a wide gap in the MIR. The $AKARI$ NEPW field lacked deep andhomogeneous optical data, limiting the use of nearly half of the IR sources forextra-galactic studies owing to the absence of photometric redshifts(photo-zs). To remedy this, we have recently obtained deep optical imaging overthe NEPW field with 5 bands ($g$, $r$, $i$, $z$, and $Y$) of the HyperSuprime-Camera (HSC) on the Subaru 8m telescope. We optically identify AKARI-IRsources along with supplementary $Spitzer$ and WISE data as well aspre-existing optical data. In this work, we derive new photo-zs using a$\chi^2$ template-fitting method code ($Le$ $Phare$) and reliable photometryfrom 26 selected filters including HSC, $AKARI$, CFHT, Maidanak, KPNO,$Spitzer$ and WISE data. We take 2026 spectroscopic redshifts (spec-z) from allavailable spectroscopic surveys over the NEPW to calibrate and assess theaccuracy of the photo-zs. At z < 1.5, we achieve a weighted photo-z dispersionof $\sigma_{\Delta{z/(1+z)}}$ = 0.053 with $\eta$ = 11.3% catastrophic errors.

Photometric Redshifts in the North Ecliptic Pole Wide Field based on a Deep Optical Survey with Hyper Suprime-Cam