The Astrophysical Journal Supplement Series (Jan 2023)

DESI z ≳ 5 Quasar Survey. I. A First Sample of 400 New Quasars at z ∼ 4.7–6.6

  • Jinyi Yang,
  • Xiaohui Fan,
  • Ansh Gupta,
  • Adam D. Myers,
  • Nathalie Palanque-Delabrouille,
  • Feige Wang,
  • Christophe Yèche,
  • Jessica Nicole Aguilar,
  • Steven Ahlen,
  • David M. Alexander,
  • David Brooks,
  • Kyle Dawson,
  • Axel de la Macorra,
  • Arjun Dey,
  • Govinda Dhungana,
  • Kevin Fanning,
  • Andreu Font-Ribera,
  • Satya Gontcho,
  • Julien Guy,
  • Klaus Honscheid,
  • Stephanie Juneau,
  • Theodore Kisner,
  • Anthony Kremin,
  • Laurent Le Guillou,
  • Michael Levi,
  • Christophe Magneville,
  • Paul Martini,
  • Aaron Meisner,
  • Ramon Miquel,
  • John Moustakas,
  • Jundan Nie,
  • Will Percival,
  • Claire Poppett,
  • Francisco Prada,
  • Edward Schlafly,
  • Gregory Tarlé,
  • Mariana Vargas Magana,
  • Benjamin Alan Weaver,
  • Risa Wechsler,
  • Rongpu Zhou,
  • Zhimin Zhou,
  • Hu Zou

DOI
https://doi.org/10.3847/1538-4365/acf99b
Journal volume & issue
Vol. 269, no. 1
p. 27

Abstract

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We report the first results of a high-redshift ( z ≳ 5) quasar survey using the Dark Energy Spectroscopic Instrument (DESI). As a DESI secondary target program, this survey is designed to carry out a systematic search and investigation of quasars at 4.8 4.7. The current spectral data set has already allowed analysis of interesting individual objects (e.g., quasars with damped Ly α absorbers and broad absorption line features), and statistical analysis will follow the survey’s completion. A set of science projects will be carried out leveraging this program, including quasar luminosity function, quasar clustering, intergalactic medium, quasar spectral properties, intervening absorbers, and properties of early supermassive black holes. Additionally, a sample of 38 new quasars at z ∼ 3.8–5.7 discovered from a pilot survey in the DESI SV1 is also published in this paper.

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