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


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
Issue number2
StatePublished - Feb 1 2009


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

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


Dive into the research topics of 'Spitzer 70/160 μm observations of high-redshift ULIRGs and HyLIRGs in the Boötes field'. Together they form a unique fingerprint.

Cite this