---
res:
  bibo_abstract:
  - We present and explore deep narrow- and medium-band data obtained with the Subaru
    and the Isaac Newton Telescopes in the ∼2 deg2 COSMOS field. We use these data
    as an extremely wide, low-resolution (R ∼ 20–80) Integral Field Unit survey to
    slice through the COSMOS field and obtain a large sample of ∼4000 Ly α emitters
    (LAEs) from z ∼ 2 to 6 in 16 redshift slices (SC4K). We present new Ly α luminosity
    functions (LFs) covering a comoving volume of ∼108 Mpc3. SC4K extensively complements
    ultradeep surveys, jointly covering over 4 dex in Ly α luminosity and revealing
    a global (2.5 < z < 6) synergy LF with α=−1.93+0.12−0.12⁠, log10Φ∗Lyα=−3.45+0.22−0.29 Mpc−3,
    and log10L∗Lyα=42.93+0.15−0.11 erg s−1. The Schechter component of the Ly α LF
    reveals a factor ∼5 rise in L∗Lyα and a ∼7 × decline in Φ∗Lyα from z ∼ 2 to 6.
    The data reveal an extra power-law (or Schechter) component above LLy α ≈ 1043.3 erg s−1
    at z ∼ 2.2–3.5 and we show that it is partially driven by X-ray and radio active
    galactic nucleus (AGN), as their Ly α LF resembles the excess. The power-law component
    vanishes and/or is below our detection limits above z > 3.5, likely linked with
    the evolution of the AGN population. The Ly α luminosity density rises by a factor
    ∼2 from z ∼ 2 to 3 but is then found to be roughly constant (⁠1.1+0.2−0.2×1040 erg s−1 Mpc−3)
    to z ∼ 6, despite the ∼0.7 dex drop in ultraviolet (UV) luminosity density. The
    Ly α/UV luminosity density ratio rises from 4 ± 1 per cent to 30 ± 6 per cent
    from z ∼ 2.2 to 6. Our results imply a rise of a factor of ≈2 in the global ionization
    efficiency (ξion) and a factor ≈4 ± 1 in the Ly α escape fraction from z ∼ 2 to
    6, hinting for evolution in both the typical burstiness/stellar populations and
    even more so in the typical interstellar medium conditions allowing Ly α photons
    to escape.@eng
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: David
      foaf_name: Sobral, David
      foaf_surname: Sobral
  - foaf_Person:
      foaf_givenName: Sérgio
      foaf_name: Santos, Sérgio
      foaf_surname: Santos
  - 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: Ana
      foaf_name: Paulino-Afonso, Ana
      foaf_surname: Paulino-Afonso
  - foaf_Person:
      foaf_givenName: Bruno
      foaf_name: Ribeiro, Bruno
      foaf_surname: Ribeiro
  - foaf_Person:
      foaf_givenName: João
      foaf_name: Calhau, João
      foaf_surname: Calhau
  - foaf_Person:
      foaf_givenName: Ali A
      foaf_name: Khostovan, Ali A
      foaf_surname: Khostovan
  bibo_doi: 10.1093/mnras/sty378
  bibo_issue: '4'
  bibo_volume: 476
  dct_date: 2018^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: evolution'
  - 'galaxies: formation'
  - 'galaxies: high-redshift'
  - 'galaxies: luminosity function'
  - mass function
  - 'galaxies: statistics'
  dct_title: 'Slicing COSMOS with SC4K: The evolution of typical Ly α emitters and
    the Ly α escape fraction from z ∼ 2 to 6@'
...