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. © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.
Simpson, C., Mortlock, D., Warren, S., Cantalupo, S., Hewett, P., Mclure, 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(4), 3454-3461 [10.1093/mnras/stu1116].
No excess of bright galaxies around the redshift 7.1 quasar ULAS J1120+0641
Cantalupo S.;
2014
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. © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.
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