Steve Croft et al. 2008 The Astronomical Journal 135 1793 doi:10.1088/0004-6256/135/5/1793
RADIO-LOUD HIGH-REDSHIFT PROTOGALAXY CANDIDATES IN BOÖTES
FREE ISSUESteve Croft1,2,3,4, Wil van Breugel1,2, Michael J. I. Brown5, Wim de Vries1,3, Arjun Dey6, Peter Eisenhardt7, Buell Jannuzi6, Huub Röttgering8, S. A. Stanford1,3, Daniel Stern7 and S. P. Willner9
Show affiliationsWe used the Near Infrared Camera on Keck I to obtain Ks -band images of four candidate high-redshift radio galaxies selected using optical and radio data in the NOAO Deep Wide-Field Survey in Boötes. Our targets have 1.4 GHz radio flux densities greater than 1 mJy, but are undetected in the optical to 
24 Vega mag. Spectral energy distribution fitting suggests that three of these objects are at z > 3, with radio luminosities near the FR-I/FR-II break. The other has photometric redshift z phot = 1.2, but may in fact be at higher redshift. Two of the four objects exhibit diffuse morphologies in Ks -band, suggesting that they are still in the process of forming.
- Keywords
galaxies: active; galaxies: high-redshift; galaxies: starburst; infrared: galaxies
- Dates
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Issue 5 (2008 May)
Received 2007 July 3, accepted for publication 2008 February 29
Published 2008 April 7
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Radio-Loud High-Redshift Protogalaxy Candidates in Boötes
Steve Croft et al. 2008 The Astronomical Journal 135 1793
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