New Corroborative Evidence for the Overdensity of Galaxies around the Radio-Loud Quasar SDSS J0836+0054 at z = 5.8
Nagao, Tohru; Taniguchi, Yoshiaki; Ajiki, Masaru; Murayama, Takashi; Shioya, Yasuhiro; Sasaki, Shunji S.; Hatakeyama, Yuichiro; Morioka, Taichi; Yokouchi, Asuka; Takahashi, Mari I.; Koizumi, Osamu
Japan, Italy
Abstract
Recently, Zheng et al. (2006) found evidence for an overdensity of galaxies around a radio-loud quasar, SDSS J0836+0054, at z = 5.8 (a 5 arcmin² field). We examined our deep optical imaging data (B, V, r', i', z', and NB816) taken with the Suprime-Cam on the Subaru Telescope. The NB816 narrow-band filter (λc = 815 and Δλ = 12nm) is suitable to search for Lyα emitters at z ≈ 5.7. We found a new strong Lyα emitter at z ≈ 5.7 close to object B, identified by Zheng et al. (2006). Further, the non-detection of nine objects selected by Zheng et al. (2006) in our B, V, and r' images provides corroborative evidence to indicate that they are high-z objects.