AKARI Deep Field South: spectroscopic observations of infrared sources

Sedgwick, Chris; Serjeant, Stephen; Pearson, Chris; Matsuura, Shuji; Shirahata, Mai; Matsuhara, Hideo; Marchetti, Lucia; White, Glenn J.; Vaccari, Mattia; Baronchelli, Ivano; Rodighiero, Giulia; Hadsukade, Bunyo; Clements, David L. and Amber, Simon (2017). AKARI Deep Field South: spectroscopic observations of infrared sources. Publications of The Korean Astronomical Society, 32(1) pp. 281–285.

DOI: https://doi.org/10.5303/PKAS.2017.32.1.281

Abstract

We present a summary of our spectroscopic redshift catalogue of 404 sources in the AKARI Deep Field South (ADF-S). We have used the AAOmega spectrograph to target mid-infrared and far-infrared sources selected primarily from AKARI observations in this field for which we were able to obtain optical counterparts. Our sources with identified redshifts include 316 with Hα detections at z ≤ 0.345 and 15 sources at z > 1 with MgII or Lα emission lines. About 13% of our z ≤ 0.345 sources are dominated by active galactic nuclei (AGN) emission, although many show emission from both star formation and AGNs. The median Balmer decrement is 5.9. Ultra-luminous infrared galaxies (ULIRGs) were found only in the higher-redshift sources. Optical and near infrared data will be available shortly, enabling calibration of the line luminosities and spectral energy distribution (SED) fitting for these sources.

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