Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs). X.
  Discovery of 35 Quasars and Luminous Galaxies at 5.7 $\le$ z $\le$ 7.0
  We report the discovery of 28 quasars and 7 luminous galaxies at 5.7 $\le$ z
$\le$ 7.0. This is the tenth in a series of papers from the Subaru High-z
Exploration of Low-Luminosity Quasars (SHELLQs) project, which exploits the
deep multi-band imaging data produced by the Hyper Suprime-Cam (HSC) Subaru
Strategic Program survey. The total number of spectroscopically identified
objects in SHELLQs has now grown to 93 high-z quasars, 31 high-z luminous
galaxies, 16 [O III] emitters at z ~ 0.8, and 65 Galactic cool dwarfs (low-mass
stars and brown dwarfs). These objects were found over 900 deg2, surveyed by
HSC between 2014 March and 2018 January. The full quasar sample includes 18
objects with very strong and narrow Ly alpha emission, whose stacked spectrum
is clearly different from that of other quasars or galaxies. While the stacked
spectrum shows N V 1240 emission and resembles that of lower-z narrow-line
quasars, the small Ly alpha width may suggest a significant contribution from
the host galaxies. Thus these objects may be composites of quasars and
star-forming galaxies.
