No excess of bright galaxies around the redshift 7.1 quasar ULAS J1120+0641
Monthly Notices of the Royal Astronomical Society
Oxford Journals on behalf of the Royal Astronomical Society
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Simpson, C., Mortlock, D., Warren, S., Cantalupo, S., Hewett, P., McLure, R., McMahon, R., & et al. (2014). No excess of bright galaxies around the redshift 7.1 quasar ULAS J1120+0641. Monthly Notices of the Royal Astronomical Society, 442 3454-3461. https://doi.org/10.1093/mnras/stu1116
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.
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’.
External DOI: https://doi.org/10.1093/mnras/stu1116
This record's URL: https://www.repository.cam.ac.uk/handle/1810/245749