Radio-loud high-redshift protogalaxy candidates in Bootes

被引：8

作者：

Croft, Steve ^{[1
,2
,3
,4
]}

Van Breugel, Wil ^{[1
,2
]}

Brown, Michael J. I. ^{[5
]}

de Vries, Wim ^{[1
,3
]}

Dey, Arjun ^{[6
]}

Eisenhardt, Peter ^{[7
]}

Jannuzi, Buell ^{[6
]}

Rottgering, Huub R. ^{[8
]}

Stanford, S. A. ^{[1
,3
]}

Stern, Daniel ^{[7
]}

Willner, S. P. ^{[9
]}

机构：

[1] Lawrence Livermore Natl Lab, Inst Geophys & Planetary Phys, Livermore, CA 94550 USA

[2] Univ Calif Merced, Merced, CA 95344 USA

[3] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA

[4] Univ Calif Berkeley, Berkeley, CA 94720 USA

[5] Monash Univ, Sch Phys, Clayton, Vic 3168, Australia

[6] Natl Opt Astron Observ, Tucson, AZ 85719 USA

[7] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[8] Leiden Observ, NL-2333 CA Leiden, Netherlands

[9] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

来源：

ASTRONOMICAL JOURNAL | 2008年 / 135卷 / 05期

关键词：

galaxies : active; galaxies : high-redshift; galaxies : starburst; infrared : galaxies;

D O I：

10.1088/0004-6256/135/5/1793

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We used the Near Infrared Camera on Keck I to obtain K-s-band images of four candidate high-redshift radio lgalaxies 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 greater than or similar 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 K-s-band, suggesting that they are still in the process of forming.

引用

页码：1793 / 1802

页数：10

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