The GLEAMing of the first supermassive black holes: II. A new sample of high-redshift radio galaxy candidates
The GLEAMing of the first supermassive black holes: II. A new sample of high-redshift radio galaxy candidates
复制标题
第一个超大质量黑洞的光芒:II。
DOI:
10.1017/pasa.2022.42
复制
发表时间:
2022
影响因子:
6.3
通讯作者:
Broderick J
中科院分区:
文献类型:
--
作者:
Broderick J
While unobscured and radio-quiet active galactic nuclei are regularly being found at redshifts , their obscured and radio-loud counterparts remain elusive. We build upon our successful pilot study, presenting a new sample of low-frequency-selected candidate high-redshift radio galaxies (HzRGs) over a sky area 20 times larger. We have refined our selection technique, in which we select sources with curved radio spectra between 72–231 MHz from the GaLactic and Extragalactic All-sky Murchison Widefield Array (GLEAM) survey. In combination with the requirements that our GLEAM-selected HzRG candidates have compact radio morphologies and be undetected in near-infrared -band imaging from the Visible and Infrared Survey Telescope for Astronomy Kilo-degree Infrared Galaxy (VIKING) survey, we find 51 new candidate HzRGs over a sky area of approximately . Our sample also includes two sources from the pilot study: the second-most distant radio galaxy currently known, at , with another source potentially at . We present our refined selection technique and analyse the properties of the sample. We model the broadband radio spectra between 74 MHz and 9 GHz by supplementing the GLEAM data with both publicly available data and new observations from the Australia Telescope Compact Array at 5.5 and 9 GHz. In addition, deep -band imaging from the High-Acuity Widefield K-band Imager (HAWK-I) on the Very Large Telescope and from the Southern Herschel Astrophysical Terahertz Large Area Survey Regions -band Survey (SHARKS) is presented for five sources. We discuss the prospects of finding very distant radio galaxies in our sample, potentially within the epoch of reionisation at .
登录
查看更多内容
DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
M. Kissler;J. Pirard;M. Casali;A. Moorwood;N. Ageorges;C. Oliveira;P. Baksai;L. Bedin;E. Bendek;P. Biereichel;B. Delabre;R. Dorn;R. Esteves;G. Finger;D. Gojak;G. Huster;Yves Jung;M. Kiekebush;B. Klein;F. Koch;J. Lizon;L. Mehrgan;M. Petr;J. Pritchard;F. Selman;J. Stegmeier
通讯作者:
J. Stegmeier
影响因子:
4.8
作者:
S. Shabala;A. Deller;S. Kaviraj;E. Middelberg;R. Turner;Y. Ting;J. Allison;T. Davis
通讯作者:
T. Davis
DOI:
10.1111/j.1365-2966.2006.10714.x
发表时间:
2006
影响因子:
4.8
作者:
I. Klamer;I. Klamer;R. Ekers;Julia J. Bryant;R. Hunstead;E. Sadler;C. Breuck
通讯作者:
C. Breuck
DOI:
--
发表时间:
2003
期刊:
影响因子:
--
作者:
A. Cohen;A. Cohen;H. Röttgering;Matt J. Jarvis;N. Kassim;T. Lazio
通讯作者:
T. Lazio
DOI:
10.1046/j.1365-8711.2003.06605.x
发表时间:
2003-03
影响因子:
4.8
作者:
T. Mauch;T. Murphy;H. Buttery;J. Curran;R. Hunstead;B. Piestrzynski;J. Robertson;E. B. G. U. O. Sydney;U. Cambridge
通讯作者:
T. Mauch;T. Murphy;H. Buttery;J. Curran;R. Hunstead;B. Piestrzynski;J. Robertson;E. B. G. U. O. Sydney;U. Cambridge