In:
The Astrophysical Journal Supplement Series, American Astronomical Society, Vol. 259, No. 1 ( 2022-03-01), p. 18-
Abstract:
We present the spectroscopic discovery of 69 quasars at 5.8 〈 z 〈 7.0, drawn from the Hyper Suprime-Cam (HSC) Subaru Strategic Program (SSP) imaging survey data. This is the 16th publication from the Subaru High- z Exploration of Low-Luminosity Quasars (SHELLQs) project, and it completes identification of all but the faintest candidates (i.e., i -band dropouts with z AB 〈 24 and y -band detections, and z -band dropouts with y AB 〈 24) with Bayesian quasar probability P Q B 〉 0.1 in the HSC-SSP third public data release (PDR3). The sample reported here also includes three quasars with P Q B 〈 0.1 at z ∼ 6.6, which we selected in an effort to completely cover the reddest point sources with simple color cuts. The number of high- z quasars discovered in SHELLQs has now grown to 162, including 23 type II quasar candidates. This paper also presents identification of seven galaxies at 5.6 〈 z 〈 6.7, an [O iii ] emitter at z = 0.954, and 31 Galactic cool stars and brown dwarfs. High- z quasars and galaxies compose 75% and 16%, respectively, of all the spectroscopic SHELLQs objects that pass our latest selection algorithm with the PDR3 photometry. That is, a total of 91% of the objects lie at z 〉 5.6. This demonstrates that the algorithm has very high efficiency, even though we are probing an unprecedentedly low luminosity population down to M 1450 ∼ −21 mag.
Type of Medium:
Online Resource
ISSN:
0067-0049
,
1538-4365
DOI:
10.3847/1538-4365/ac3d31
Language:
Unknown
Publisher:
American Astronomical Society
Publication Date:
2022
detail.hit.zdb_id:
2006860-8
detail.hit.zdb_id:
2207650-5
SSG:
16,12
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