Poster Presentation
A search for high-z red quasars with the Subaru HSC and WISE data
Presenter: Nanako Kato (Ehime University)
Red quasars are thought be in the phase of transition from hidden accretion
(obscured BH growing phase) to unobscured radiation (traditional quasar),
i.e. “blowout" phase. As such, this population is an useful probe to
understand the formation and evolution of quasars and their host galaxies.
Recently, more than 80 new high-z (z > 5.7) quasars have been discovered by
the Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs) project,
based on the Subaru Hyper Suprime-Cam (HSC) SSP survey. We are using this
sample to reveal whether red quasars prevail in the early universe. The
candidates of red quasars were selected with a combination of the HSC and
WISE data, which yielded three candidates with WISE detection so far. We
constructed the broadband SEDs of each candidate and derived the color
excess E(B -V), to see if the candidates meet the definition of a red
quasar (E(B-V) > 0.1). In this poster, we will present our strategy to
search for high-z red quasars and report some preliminary results.