Spitzer 70/160 μm observations of high-redshift ULIRGs and HyLIRGs in the Boötes field

  • Krystal D. Tyler
  • , Emeric Le Floc'H
  • , George H. Rieke
  • , Arjun Dey
  • , Vandana Desai
  • , Kate Brand
  • , Colin Borys
  • , Buell T. Jannuzi
  • , Lee Armus
  • , Herve Dole
  • , Casey Papovich
  • , Michael J.I. Brown
  • , Myra Blaylock
  • , Sarah J.U. Higdon
  • , James L. Higdon
  • , Vassilis Charmandaris
  • , Matthew L.N. Ashby
  • , Howard A. Smith

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

We present new 70 and 160 μm observations of a sample of extremely red (R-[24] ≳ 15 mag), mid-infrared bright, high-redshift (1.7 ≲ z ≲ 2.8) galaxies. All targets detected in the far-infrared exhibit rising spectral energy distributions (SEDs) consistent with dust emission from obscured active galactic nuclei (AGNs) and/or star-forming regions in luminous IR galaxies (LIRGs). We find that the SEDs of the high-redshift sources are more similar to canonical AGN-dominated local ultraluminous IR galaxies (ULIRGs) with significant warm dust components than to typical local star-forming ULIRGs. The inferred IR (8-1000 μm) bolometric luminosities are found to be L bol 4 × 1012 L to3 × 1013 L (ULIRGs/hyper-luminous IR galaxies (HyLIRGs)), representing the first robust constraints on L bol for this class of object.

Original languageEnglish (US)
Pages (from-to)1846-1853
Number of pages8
JournalAstrophysical Journal
Volume691
Issue number2
DOIs
StatePublished - Feb 1 2009

Keywords

  • dust, extinction
  • galaxies: active
  • galaxies: high-redshift
  • galaxies: photometry
  • galaxies: starburst
  • infrared: galaxies

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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