---
res:
  bibo_abstract:
  - We present a sample of ∼1000 emission-line galaxies at z = 0.4–4.7 from the ∼0.7deg2
    High-z Emission-Line Survey in the Boötes field identified with a suite of six
    narrow-band filters at ≈0.4–2.1 μm. These galaxies have been selected on their
    Ly α (73), [O II] (285), H β/[O III] (387) or H α (362) emission line, and have
    been classified with optical to near-infrared colours. A subsample of 98 sources
    have reliable redshifts from multiple narrow-band (e.g. [O II]–H α) detections
    and/or spectroscopy. In this survey paper, we present the observations, selection
    and catalogues of emitters. We measure number densities of Ly α, [O II], H β/[O III]
    and H α and confirm strong luminosity evolution in star-forming galaxies from
    z ∼ 0.4 to ∼5, in agreement with previous results. To demonstrate the usefulness
    of dual-line emitters, we use the sample of dual [O II]–H α emitters to measure
    the observed [O II]/H α ratio at z = 1.47. The observed [O II]/H α ratio increases
    significantly from 0.40 ± 0.01 at z = 0.1 to 0.52 ± 0.05 at z = 1.47, which we
    attribute to either decreasing dust attenuation with redshift, or due to a bias
    in the (typically) fibre measurements in the local Universe that only measure
    the central kpc regions. At the bright end, we find that both the H α and Ly α
    number densities at z ≈ 2.2 deviate significantly from a Schechter form, following
    a power law. We show that this is driven entirely by an increasing X-ray/active
    galactic nucleus fraction with line luminosity, which reaches ≈100 per cent at
    line luminosities L ≳ 3 × 1044 erg s−1.@eng
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: Jorryt J
      foaf_name: Matthee, Jorryt J
      foaf_surname: Matthee
      foaf_workInfoHomepage: http://www.librecat.org/personId=7439a258-f3c0-11ec-9501-9df22fe06720
    orcid: 0000-0003-2871-127X
  - foaf_Person:
      foaf_givenName: David
      foaf_name: Sobral, David
      foaf_surname: Sobral
  - foaf_Person:
      foaf_givenName: Philip
      foaf_name: Best, Philip
      foaf_surname: Best
  - foaf_Person:
      foaf_givenName: Ian
      foaf_name: Smail, Ian
      foaf_surname: Smail
  - foaf_Person:
      foaf_givenName: Fuyan
      foaf_name: Bian, Fuyan
      foaf_surname: Bian
  - foaf_Person:
      foaf_givenName: Behnam
      foaf_name: Darvish, Behnam
      foaf_surname: Darvish
  - foaf_Person:
      foaf_givenName: Huub
      foaf_name: Röttgering, Huub
      foaf_surname: Röttgering
  - foaf_Person:
      foaf_givenName: Xiaohui
      foaf_name: Fan, Xiaohui
      foaf_surname: Fan
  bibo_doi: 10.1093/mnras/stx1569
  bibo_issue: '1'
  bibo_volume: 471
  dct_date: 2017^xs_gYear
  dct_isPartOf:
  - http://id.crossref.org/issn/0035-8711
  - http://id.crossref.org/issn/1365-2966
  dct_language: eng
  dct_publisher: Oxford University Press@
  dct_subject:
  - Space and Planetary Science
  - Astronomy and Astrophysics galaxies
  - active
  - galaxies
  - evolution
  - galaxies
  - high-redshift
  - galaxies
  - luminosity function
  - mass function
  - 'galaxies: star formation'
  dct_title: 'Boötes-HiZELS: An optical to near-infrared survey of emission-line galaxies
    at z = 0.4–4.7@'
...