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Title: HECTOSPEC AND HYDRA SPECTRA OF INFRARED LUMINOUS SOURCES IN THE AKARI NORTH ECLIPTIC POLE SURVEY FIELD

We present spectra of 1796 sources selected in the AKARI North Ecliptic Pole Wide Survey field, obtained with MMT/Hectospec and WIYN/Hydra, for which we measure 1645 redshifts. We complemented the generic flux-limited spectroscopic surveys at 11 {mu}m and 15 {mu}m, with additional sources selected based on the MIR and optical colors. In MMT/Hectospec observations, the redshift identification rates are {approx}80% for objects with R < 21.5 mag. On the other hand, in WIYN/Hydra observations, the redshift identification rates are {approx}80% at R magnitudes brighter than 19 mag. The observed spectra were classified through the visual inspection or from the line diagnostics. We identified 1128 star-forming or absorption-line-dominated galaxies, 198 Type-1 active galactic nuclei (AGNs), 8 Type-2 AGNs, 121 Galactic stars, and 190 spectra in unknown category due to low signal-to-noise ratio. The spectra were flux-calibrated but to an accuracy of 0.1-0.18 dex for most of the targets and worse for the remainder. We derive star formation rates (SFRs) from the mid-infrared fluxes or from the optical emission lines, showing that our sample spans an SFR range of 0.1 to a few hundred M{sub Sun} yr{sup -1}. We find that the extinction inferred from the difference between the IR and opticalmore » SFR increases as the IR luminosity increases but with a large scatter.« less
Authors:
 [1] ; ; ; ;  [2] ;  [3] ;  [4] ;  [5] ; ;  [6]
  1. Department of Earth Science Education, Kyungpook National University, Daegu 702-701 (Korea, Republic of)
  2. Department of Physics and Astronomy, FPRD, Seoul National University, Seoul 151-742 (Korea, Republic of)
  3. Korea Astronomy and Space Science Institute (KASI), Daejeon 305-348 (Korea, Republic of)
  4. Center for the Exploration of the Origin of the Universe (CEOU), Seoul National University, Seoul 151-742 (Korea, Republic of)
  5. George P. and Cynthia W. Mitchell Institute for Fundamental Physics and Astronomy, Department of Physics, Texas A and M University, College Station, TX 77843 (United States)
  6. Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721 (United States)
Publication Date:
OSTI Identifier:
22136582
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal, Supplement Series; Journal Volume: 207; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ABSORPTION; ACCURACY; COLOR; EMISSION; GALAXIES; GALAXY NUCLEI; INFRARED RADIATION; INSPECTION; LUMINOSITY; RED SHIFT; SIGNAL-TO-NOISE RATIO; SPECTRA