---
res:
  bibo_abstract:
  - The increasingly neutral intergalactic gas at z > 6 impacts the Lyman-α (Lyα)
    flux observed from galaxies. One luminous galaxy, COLA1, stands out because of
    its unique double-peaked Lyα line at z = 6.6, unseen in any simulation of reionization.
    Here, we present JWST/NIRCam wide-field slitless spectroscopy in a 21 arcmin2
    field centered on COLA1. We find 141 galaxies spectroscopically selected through
    the [O III] doublet at 5.35 < z < 6.95, with 40 of these sources showing Hβ. For
    COLA1, we additionally detect [O III]4363 as well as Hγ. We measure a systemic
    redshift of z = 6.5917 for COLA1, confirming the classical double-peak nature
    of the Lyα profile. This implies that it resides in a highly ionized bubble and
    that it is leaking ionizing photons with a high escape fraction of fesc(LyC) = 20–50%,
    making it a prime laboratory to study Lyman continuum escape in the Epoch of Reionization.
    COLA1 shows all the signs of a prolific ionizer with a Lyα escape fraction of
    81 ± 5%, Balmer decrement indicating no dust, a steep UV slope (βUV = −3.2 ± 0.4),
    and a star-formation surface density ≳10× that of typical galaxies at similar
    redshift. We detect five galaxies in COLA1’s close environment (Δz < 0.02). Exploiting
    the high spectroscopic completeness inherent to grism surveys, and using mock
    simulations that fully mimic the selection function, we show that the number of
    detected companions is very typical for a normal similarly UV-bright (MUV ∼ −21.3)
    galaxy – that is, the ionized bubble around COLA1 is unlikely to be due to an
    excessively large over-density. Instead, the measured ionizing properties suggest
    that COLA1 by itself might be powering the bubble required to explain its double-peaked
    Lyα profile (Rion ≈ 0.7 pMpc), with only minor contributions from detected neighbors
    (−19.5 ≲ MUV ≲ −17.5).@eng
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: Alberto
      foaf_name: Torralba-Torregrosa, Alberto
      foaf_surname: Torralba-Torregrosa
  - 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: Rohan P.
      foaf_name: Naidu, Rohan P.
      foaf_surname: Naidu
  - foaf_Person:
      foaf_givenName: Ruari
      foaf_name: Mackenzie, Ruari
      foaf_surname: Mackenzie
  - foaf_Person:
      foaf_givenName: Gabriele
      foaf_name: Pezzulli, Gabriele
      foaf_surname: Pezzulli
  - foaf_Person:
      foaf_givenName: Anne
      foaf_name: Hutter, Anne
      foaf_surname: Hutter
  - foaf_Person:
      foaf_givenName: Pablo
      foaf_name: Arnalte-Mur, Pablo
      foaf_surname: Arnalte-Mur
  - foaf_Person:
      foaf_givenName: Siddhartha
      foaf_name: Gurung-López, Siddhartha
      foaf_surname: Gurung-López
  - foaf_Person:
      foaf_givenName: Sandro
      foaf_name: Tacchella, Sandro
      foaf_surname: Tacchella
  - foaf_Person:
      foaf_givenName: Pascal
      foaf_name: Oesch, Pascal
      foaf_surname: Oesch
  - foaf_Person:
      foaf_givenName: Daichi
      foaf_name: Kashino, Daichi
      foaf_surname: Kashino
  - foaf_Person:
      foaf_givenName: Charlie
      foaf_name: Conroy, Charlie
      foaf_surname: Conroy
  - foaf_Person:
      foaf_givenName: David
      foaf_name: Sobral, David
      foaf_surname: Sobral
  bibo_doi: 10.1051/0004-6361/202450318
  bibo_volume: 689
  dct_date: 2024^xs_gYear
  dct_identifier:
  - UT:001303205700016
  dct_isPartOf:
  - http://id.crossref.org/issn/0004-6361
  - http://id.crossref.org/issn/1432-0746
  dct_language: eng
  dct_publisher: EDP Sciences@
  dct_title: 'Anatomy of an ionized bubble: NIRCam grism spectroscopy of the z = 6.6
    double-peaked Lyman- α emitter COLA1 and its environment@'
...