Radio-loud high-redshift protogalaxy candidates in botes

Steve Croft; Wil Van Breugel; Michael J.I. Brown; Wim De Vries; Arjun Dey; Peter Eisenhardt; Buell Jannuzi; Huub Röttgering; S. A. Stanford; Daniel Stern; S. P. Willner

doi:10.1088/0004-6256/135/5/1793

Radio-loud high-redshift protogalaxy candidates in botes

Steve Croft, Wil Van Breugel, Michael J.I. Brown, Wim De Vries, Arjun Dey, Peter Eisenhardt, Buell Jannuzi, Huub Röttgering, S. A. Stanford, Daniel Stern, S. P. Willner

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

We used the Near Infrared Camera on Keck I to obtain K_s -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 K_s -band, suggesting that they are still in the process of forming.

Original language	English (US)
Pages (from-to)	1793-1802
Number of pages	10
Journal	Astronomical Journal
Volume	135
Issue number	5
DOIs	https://doi.org/10.1088/0004-6256/135/5/1793
State	Published - May 1 2008
Externally published	Yes

Keywords

Galaxies: active
Galaxies: high-redshift
Galaxies: starburst
Infrared: galaxies

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1088/0004-6256/135/5/1793

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title = "Radio-loud high-redshift protogalaxy candidates in botes",

abstract = "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 Bo{\"o}tes. 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",

author = "Steve Croft and {Van Breugel}, Wil and Brown, {Michael J.I.} and {De Vries}, Wim and Arjun Dey and Peter Eisenhardt and Buell Jannuzi and Huub R{\"o}ttgering and Stanford, {S. A.} and Daniel Stern and Willner, {S. P.}",

year = "2008",

month = may,

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doi = "10.1088/0004-6256/135/5/1793",

language = "English (US)",

volume = "135",

pages = "1793--1802",

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publisher = "American Astronomical Society",

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TY - JOUR

T1 - Radio-loud high-redshift protogalaxy candidates in botes

AU - Croft, Steve

AU - Van Breugel, Wil

AU - Brown, Michael J.I.

AU - De Vries, Wim

AU - Dey, Arjun

AU - Eisenhardt, Peter

AU - Jannuzi, Buell

AU - Röttgering, Huub

AU - Stanford, S. A.

AU - Stern, Daniel

AU - Willner, S. P.

PY - 2008/5/1

Y1 - 2008/5/1

N2 - 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 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.

AB - 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 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.

KW - Galaxies: active

KW - Galaxies: high-redshift

KW - Galaxies: starburst

KW - Infrared: galaxies

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U2 - 10.1088/0004-6256/135/5/1793

DO - 10.1088/0004-6256/135/5/1793

M3 - Article

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SN - 0004-6256

VL - 135

SP - 1793

EP - 1802

JO - Astronomical Journal

JF - Astronomical Journal

IS - 5

ER -

Radio-loud high-redshift protogalaxy candidates in botes

Abstract

Keywords

ASJC Scopus subject areas

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