University of Hertfordshire

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From the same journal

By the same authors

Documents

  • W. L. Williams
  • P. N. Best
  • J. H. Croston
  • K. J. Duncan
  • H. J. A. Rottgering
  • J. Sabater
  • T. W. Shimwell
  • C. Tasse
  • J. R. Callingham
  • R. K. Cochrane
  • F. de Gasperin
  • G. Gurkan
  • M. J. Jarvis
  • V. Mahatma
  • G. K. Miley
  • B. Mingo
  • S. Mooney
  • L. K. Morabito
  • S. P. O'Sullivan
  • I. Prandoni
  • A. Shulevski
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Original languageEnglish
JournalAstronomy & Astrophysics
Journal publication date19 Nov 2018
Early online date19 Nov 2018
DOIs
Publication statusE-pub ahead of print - 19 Nov 2018

Abstract

We constructed a sample of 23,344 radio-loud active galactic nuclei (RLAGN) from the catalogue derived from the LOFAR Two-Metre Sky Survey (LoTSS) survey of the HETDEX Spring field. Although separating AGN from star-forming galaxies remains challenging, the combination of spectroscopic and photometric techniques we used gives us one of the largest available samples of candidate RLAGN. We used the sample, combined with recently developed analytical models, to investigate the lifetime distribution of RLAGN. We show that large or giant powerful RLAGN are probably the old tail of the general RLAGN population, but that the low-luminosity RLAGN candidates in our sample, many of which have sizes $

Notes

21 pages, 11 colour figures. This paper is part of the LOFAR surveys data release 1 and has been accepted for publication in a special edition of A&A that will appear in Feb 2019, volume 622. The catalogues and images from the data release will be publicly available at https://lofar-surveys.org/ upon publication of the journal. Reproduced with permission from Astronomy & Astrophysics. © 2018 ESO

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