Subaru High-z Exploration of Low-luminosity Quasars (SHELLQs). XXIV. 54 New Quasars and Candidate Obscured Quasars at 5.71 ≤ z ≤ 7.02
We present spectroscopic identification of 43 quasars and 11 candidate obscured quasars in the epoch of reionization (EoR) at 5.71 ≤ z ≤ 7.02, along with 29 galaxies at similar redshifts. This is the 24th publication from the Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs) project, whi...
| Autores: | , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/406246 |
| Acceso en línea: | http://hdl.handle.net/10261/406246 https://api.elsevier.com/content/abstract/scopus_id/105018204781 |
| Access Level: | acceso abierto |
| Palabra clave: | Quasars High-redshift galaxies Reionization Sky surveys |
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Subaru High-z Exploration of Low-luminosity Quasars (SHELLQs). XXIV. 54 New Quasars and Candidate Obscured Quasars at 5.71 ≤ z ≤ 7.02 |
| title |
Subaru High-z Exploration of Low-luminosity Quasars (SHELLQs). XXIV. 54 New Quasars and Candidate Obscured Quasars at 5.71 ≤ z ≤ 7.02 |
| spellingShingle |
Subaru High-z Exploration of Low-luminosity Quasars (SHELLQs). XXIV. 54 New Quasars and Candidate Obscured Quasars at 5.71 ≤ z ≤ 7.02 Matsuoka, Yoshiki Quasars High-redshift galaxies Reionization Sky surveys |
| title_short |
Subaru High-z Exploration of Low-luminosity Quasars (SHELLQs). XXIV. 54 New Quasars and Candidate Obscured Quasars at 5.71 ≤ z ≤ 7.02 |
| title_full |
Subaru High-z Exploration of Low-luminosity Quasars (SHELLQs). XXIV. 54 New Quasars and Candidate Obscured Quasars at 5.71 ≤ z ≤ 7.02 |
| title_fullStr |
Subaru High-z Exploration of Low-luminosity Quasars (SHELLQs). XXIV. 54 New Quasars and Candidate Obscured Quasars at 5.71 ≤ z ≤ 7.02 |
| title_full_unstemmed |
Subaru High-z Exploration of Low-luminosity Quasars (SHELLQs). XXIV. 54 New Quasars and Candidate Obscured Quasars at 5.71 ≤ z ≤ 7.02 |
| title_sort |
Subaru High-z Exploration of Low-luminosity Quasars (SHELLQs). XXIV. 54 New Quasars and Candidate Obscured Quasars at 5.71 ≤ z ≤ 7.02 |
| dc.creator.none.fl_str_mv |
Matsuoka, Yoshiki Iwasawa, Kazushi Onoue, Masafusa Izumi, Takuma Strauss, Michael A. Akiyama, Masayuki Aoki, Kentaro Arita, Junya Ding, Xuheng Imanishi, Masatoshi Kashikawa, Nobunari Kawaguchi, Toshihiro Kikuta, Satoshi Kohno, Kotaro Lee, Chien-Hsiu Nagao, Tohru Phillips, Camryn L. Sawamura, Mahoshi Silverman, John D. Takahashi, Ayumi Toba, Yoshiki |
| author |
Matsuoka, Yoshiki |
| author_facet |
Matsuoka, Yoshiki Iwasawa, Kazushi Onoue, Masafusa Izumi, Takuma Strauss, Michael A. Akiyama, Masayuki Aoki, Kentaro Arita, Junya Ding, Xuheng Imanishi, Masatoshi Kashikawa, Nobunari Kawaguchi, Toshihiro Kikuta, Satoshi Kohno, Kotaro Lee, Chien-Hsiu Nagao, Tohru Phillips, Camryn L. Sawamura, Mahoshi Silverman, John D. Takahashi, Ayumi Toba, Yoshiki |
| author_role |
author |
| author2 |
Iwasawa, Kazushi Onoue, Masafusa Izumi, Takuma Strauss, Michael A. Akiyama, Masayuki Aoki, Kentaro Arita, Junya Ding, Xuheng Imanishi, Masatoshi Kashikawa, Nobunari Kawaguchi, Toshihiro Kikuta, Satoshi Kohno, Kotaro Lee, Chien-Hsiu Nagao, Tohru Phillips, Camryn L. Sawamura, Mahoshi Silverman, John D. Takahashi, Ayumi Toba, Yoshiki |
| author2_role |
author author author author author author author author author author author author author author author author author author author author |
| dc.contributor.none.fl_str_mv |
Japan Society for the Promotion of Science Ministerio de Ciencia e Innovación (España) Agencia Estatal de Investigación (España) Matsuoka, Yoshiki [0000-0001-5063-0340] Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72] |
| dc.subject.none.fl_str_mv |
Quasars High-redshift galaxies Reionization Sky surveys |
| topic |
Quasars High-redshift galaxies Reionization Sky surveys |
| description |
We present spectroscopic identification of 43 quasars and 11 candidate obscured quasars in the epoch of reionization (EoR) at 5.71 ≤ z ≤ 7.02, along with 29 galaxies at similar redshifts. This is the 24th publication from the Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs) project, which exploits the Hyper Suprime-Cam (HSC) Subaru Strategic Program (SSP) imaging survey to search for EoR quasars. The HSC-SSP survey has finished, and this paper is likely the final installment of major (unobscured) quasar discoveries from the SHELLQs project. In addition to the EoR objects, we identified five strong [O iii] line emitters at z < 1, 30 Galactic brown dwarfs, and 14 passive galaxies at z ∼ 2, which contaminated our sample of photometric quasar candidates. The present paper focuses on describing the immediate outcome of the spectroscopic observations, while a statistical analysis of the full SHELLQs sample will be presented in our next publication. |
| publishDate |
2025 |
| dc.date.none.fl_str_mv |
2025 2025 2025 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article http://purl.org/coar/resource_type/c_6501 Publisher's version info:eu-repo/semantics/publishedVersion |
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article |
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publishedVersion |
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http://hdl.handle.net/10261/406246 https://api.elsevier.com/content/abstract/scopus_id/105018204781 |
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http://hdl.handle.net/10261/406246 https://api.elsevier.com/content/abstract/scopus_id/105018204781 |
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Inglés |
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Inglés |
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info:eu-repo/semantics/openAccess |
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openAccess |
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application/pdf |
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American Astronomical Society IOP Publishing |
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American Astronomical Society IOP Publishing |
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reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC instname:Consejo Superior de Investigaciones Científicas (CSIC) |
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Subaru High-z Exploration of Low-luminosity Quasars (SHELLQs). XXIV. 54 New Quasars and Candidate Obscured Quasars at 5.71 ≤ z ≤ 7.02Matsuoka, YoshikiIwasawa, KazushiOnoue, MasafusaIzumi, TakumaStrauss, Michael A.Akiyama, MasayukiAoki, KentaroArita, JunyaDing, XuhengImanishi, MasatoshiKashikawa, NobunariKawaguchi, ToshihiroKikuta, SatoshiKohno, KotaroLee, Chien-HsiuNagao, TohruPhillips, Camryn L.Sawamura, MahoshiSilverman, John D.Takahashi, AyumiToba, YoshikiQuasarsHigh-redshift galaxiesReionizationSky surveysWe present spectroscopic identification of 43 quasars and 11 candidate obscured quasars in the epoch of reionization (EoR) at 5.71 ≤ z ≤ 7.02, along with 29 galaxies at similar redshifts. This is the 24th publication from the Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs) project, which exploits the Hyper Suprime-Cam (HSC) Subaru Strategic Program (SSP) imaging survey to search for EoR quasars. The HSC-SSP survey has finished, and this paper is likely the final installment of major (unobscured) quasar discoveries from the SHELLQs project. In addition to the EoR objects, we identified five strong [O iii] line emitters at z < 1, 30 Galactic brown dwarfs, and 14 passive galaxies at z ∼ 2, which contaminated our sample of photometric quasar candidates. The present paper focuses on describing the immediate outcome of the spectroscopic observations, while a statistical analysis of the full SHELLQs sample will be presented in our next publication.This research is based on data collected at the Subaru Telescope, which is operated by the National Astronomical Observatory of Japan. We are honored and grateful for the opportunity of observing the Universe from Maunakea, which has cultural, historical and natural significance in Hawaii. We appreciate the staff members of the telescope for their support during our FOCAS observations. The data analysis was in part carried out on the open use data analysis computer system at the Astronomy Data Center of NAOJ. This work is also based on observations made with the GTC, installed at the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofísica de Canarias, on the island of La Palma. We thank the support astronomers for their help during preparation and execution of our observing program. Y. M. was supported by the Japan Society for the Promotion of Science (JSPS) KAKENHI grant No. 21H04494. K. I. acknowledges the support under the grant PID2022-136827NB-C44 provided by MCIN/AEI /10.13039/501100011033 / FEDER, EU. M.O. was supported by the JSPS KAKENHI grant No. G24K22894. The HSC collaboration includes the astronomical communities of Japan and Taiwan, and Princeton University. The HSC instrumentation and software were developed by the National Astronomical Observatory of Japan (NAOJ), the Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU), the University of Tokyo, the High Energy Accelerator Research Organization (KEK), the Academia Sinica Institute for Astronomy and Astrophysics in Taiwan (ASIAA), and Princeton University. Funding was contributed by the FIRST program from the Japanese Cabinet Office, the Ministry of Education, Culture, Sports, Science and Technology (MEXT), the Japan Society for the Promotion of Science (JSPS), Japan Science and Technology Agency (JST), the Toray Science Foundation, NAOJ, Kavli IPMU, KEK, ASIAA, and Princeton University. This paper is based on data retrieved from the HSC data archive system, which is operated by Subaru Telescope and Astronomy Data Center (ADC) at NAOJ. Data analysis was in part carried out with the cooperation of Center for Computational Astrophysics (CfCA) at NAOJ. This paper makes use of software developed for Vera C. Rubin Observatory. We thank the Rubin Observatory for making their code available as free software at http://pipelines.lsst.io/. The Pan-STARRS1 Surveys (PS1) and the PS1 public science archive have been made possible through contributions by the Institute for Astronomy, the University of Hawaii, the Pan-STARRS Project Office, the Max Planck Society and its participating institutes, the Max Planck Institute for Astronomy, Heidelberg, and the Max Planck Institute for Extraterrestrial Physics, Garching, The Johns Hopkins University, Durham University, the University of Edinburgh, the Queen’s University Belfast, the Harvard-Smithsonian Center for Astrophysics, the Las Cumbres Observatory Global Telescope Network Incorporated, the National Central University of Taiwan, the Space Telescope Science Institute, the National Aeronautics and Space Administration under grant No. NNX08AR22G issued through the Planetary Science Division of the NASA Science Mission Directorate, the National Science Foundation grant No. AST-1238877, the University of Maryland, Eotvos Lorand University (ELTE), the Los Alamos National Laboratory, and the Gordon and Betty Moore Foundation.Peer reviewedAmerican Astronomical SocietyIOP PublishingJapan Society for the Promotion of ScienceMinisterio de Ciencia e Innovación (España)Agencia Estatal de Investigación (España)Matsuoka, Yoshiki [0000-0001-5063-0340]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202520252025info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/10261/406246https://api.elsevier.com/content/abstract/scopus_id/105018204781reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2022-136827NB-C44https://doi.org/10.3847/1538-4365/ae0035Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/4062462026-05-22T06:33:51Z |
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15.811543 |