Jinyi Yang
DESI z ≳ 5 Quasar Survey. I. A First Sample of 400 New Quasars at z ∼ 4.7–6.6
Yang, Jinyi; Fan, Xiaohui; Gupta, Ansh; Myers, Adam D.; Palanque-Delabrouille, Nathalie; Wang, Feige; Yèche, Christophe; Aguilar, Jessica Nicole; Ahlen, Steven; Alexander, David M.; Brooks, David; Dawson, Kyle; de la Macorra, Axel; Dey, Arjun; Dhungana, Govinda; Fanning, Kevin; Font-Ribera, Andreu; Gontcho, Satya; Guy, Julien; Honscheid, Klaus; Juneau, Stephanie; Kisner, Theodore; Kremin, Anthony; Le Guillou, Laurent; Levi, Michael; Magneville, Christophe; Martini, Paul; Meisner, Aaron; Miquel, Ramon; Moustakas, John; Nie, Jundan; Percival, Will; Poppett, Claire; Prada, Francisco; Schlafly, Edward; Tarlé, Gregory; Vargas Magana, Mariana; Weaver, Benjamin Alan; Wechsler, Risa; Zhou, Rongpu; Zhou, Zhimin; Zou, Hu
Authors
Xiaohui Fan
Ansh Gupta
Adam D. Myers
Nathalie Palanque-Delabrouille
Feige Wang
Christophe Yèche
Jessica Nicole Aguilar
Steven Ahlen
Professor David Alexander d.m.alexander@durham.ac.uk
Professor
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
Abstract
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 < z < 6.8. The target selection is based on the DESI Legacy Imaging Surveys (the Legacy Surveys) DR9 photometry, combined with the Pan-STARRS1 data and J-band photometry from public surveys. A first quasar sample has been constructed from the DESI Survey Validation 3 (SV3) and first-year observations until 2022 May. This sample includes more than 400 new quasars at redshift 4.7 ≤ z < 6.6, down to 21.5 magnitude (AB) in the z band, discovered from 35% of the entire target sample. Remarkably, there are 220 new quasars identified at z ≥ 5, more than one-third of existing quasars previously published at this redshift. The observations so far result in an average success rate of 23% at z > 4.7. The current spectral data set has already allowed analysis of interesting individual objects (e.g., quasars with damped Lyα 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.
Citation
Yang, J., Fan, X., Gupta, A., Myers, A. D., Palanque-Delabrouille, N., Wang, F., …Zou, H. (2023). DESI z ≳ 5 Quasar Survey. I. A First Sample of 400 New Quasars at z ∼ 4.7–6.6. Astrophysical Journal Supplement, 269(1), Article 27. https://doi.org/10.3847/1538-4365/acf99b
Journal Article Type | Article |
---|---|
Acceptance Date | Aug 31, 2023 |
Online Publication Date | Nov 6, 2023 |
Publication Date | Nov 1, 2023 |
Deposit Date | Feb 26, 2024 |
Publicly Available Date | Feb 26, 2024 |
Journal | The Astrophysical Journal Supplement Series |
Print ISSN | 0067-0049 |
Electronic ISSN | 1538-4365 |
Publisher | American Astronomical Society |
Peer Reviewed | Peer Reviewed |
Volume | 269 |
Issue | 1 |
Article Number | 27 |
DOI | https://doi.org/10.3847/1538-4365/acf99b |
Keywords | Space and Planetary Science; Astronomy and Astrophysics |
Public URL | https://durham-repository.worktribe.com/output/2287178 |
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Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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