Radio-loud high-redshift protogalaxy canidates in Bootes

Journal Article · Fri Jul 20 00:00:00 EDT 2007 · The Astronomical Journal, na, no. 5, May 1, 2008, pp. 1793-1802

OSTI ID:940895

Croft, S; van Breugel, W; Brown, M J; de Vries, W; Dey, A; Eisenhardt, P; Jannuzi, B; Rottgering, H; Stanford, S A; Stern, D; Willner, S P

We used the Near Infrared Camera (NIRC) on Keck I to obtain K{sub s}-band images of four candidate high-redshift radio galaxies selected using optical and radio data in the NOAO Deep Wide-Field Survey in Bootes. Our targets have 1.4 GHz radio flux densities greater than 1 mJy, but are undetected in the optical. 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{sub phot} = 1.2, but may in fact be at higher redshift. Two of the four objects exhibit diffuse morphologies in K{sub s}-band, suggesting that they are still in the process of forming.

• Research Organization: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 940895
• Report Number(s): UCRL-JRNL-233065; TRN: US200824%%391
• Journal Information: The Astronomical Journal, na, no. 5, May 1, 2008, pp. 1793-1802, Journal Issue: 5
• Country of Publication: United States
• Language: English

Related Subjects

99 GENERAL AND MISCELLANEOUS
CAMERAS
ENERGY SPECTRA
RADIO GALAXIES
TARGETS