No excess of bright galaxies around the redshift 7.1 quasar ULAS J1120+0641
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Authors
Abstract
We present optical and near-infrared imaging of the field of the z = 7.0842 quasar ULAS J112001.48+064124.3 taken with the Hubble Space Telescope. We use these data to search for galaxies that may be physically associated with the quasar, using the Lyman break technique, and find three such objects, although the detection of one in Spitzer Space Telescope imaging strongly suggests it lies at z ∼ 2. This is consistent with the field luminosity function and indicates that there is no excess of >L★ galaxies within 1 Mpc of the quasar. A detection of the quasar shortwards of the Lyα line is consistent with the previously observed evolution of the intergalactic medium at z > 5.5.
Description
Keywords
galaxies: active, galaxies: formation, galaxies: high redshift, quasars: individual: ULAS J1120+0641, dark ages, reionization, first stars
Journal Title
Monthly Notices of the Royal Astronomical Society
Conference Name
Journal ISSN
0035-8711
1365-2966
1365-2966
Volume Title
442
Publisher
Oxford University Press (OUP)
Publisher DOI
Sponsorship
Science and Technology Facilities Council (ST/H00243X/1)
Science and Technology Facilities Council (ST/L001381/1)
Science and Technology Facilities Council (ST/L001381/1)
SC acknowledges support from the NSF grant AST-1010004 and NASA HST grant GO-13033.06-A, RJM acknowledges ERC funding via the award of a consolidator grant, and BV has been supported by the ERC grant ‘Cosmic Dawn’.