Radio-loud high-redshift protogalaxy candidates in Bootes
| Autor: | Croft, Steve, van Breugel, Wil, Brown, Michael J. I., de Vries, Wim, Dey, Arjun, Eisenhardt, Peter, Jannuzi, Buell, Röttgering, Huub, Stanford, S. A., Stern, Daniel, Willner, S. P. |
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| Rok vydání: | 2008 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1088/0004-6256/135/5/1793 |
| Popis: | We 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 Bootes. Our targets have 1.4 GHz radio flux densities greater than 1 mJy, but are undetected in the optical to fainter than 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 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. Comment: 25 pages, 8 figures, accepted for publication in AJ; minor changes to match published version |
| Databáze: | arXiv |
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