The Cosmic Ultraviolet Baryon Survey (CUBS). VIII. Group Environment of the Most Luminous Quasars at z ≈ 1 - Archive ouverte HAL
Article Dans Une Revue The Astrophysical Journal Année : 2024

The Cosmic Ultraviolet Baryon Survey (CUBS). VIII. Group Environment of the Most Luminous Quasars at z ≈ 1

Jennifer I-Hsiu Li
  • Fonction : Auteur
Sean D Johnson
  • Fonction : Auteur
Erin Boettcher
  • Fonction : Auteur
Sebastiano Cantalupo
  • Fonction : Auteur
Hsiao-Wen Chen
  • Fonction : Auteur
Mandy C Chen
  • Fonction : Auteur
David R Depalma
  • Fonction : Auteur
Zhuoqi Liu
  • Fonction : Auteur
Nishant Mishra
  • Fonction : Auteur
Zhijie Qu
  • Fonction : Auteur
Gwen C Rudie
  • Fonction : Auteur
Joop Schaye
  • Fonction : Auteur
Fakhri S Zahedy
  • Fonction : Auteur

Résumé

We investigate the group-scale environment of 15 luminous quasars (luminosity L$_{3000}$ > 10$^{46}$ erg s$^{−1}$) from the Cosmic Ultraviolet Baryon Survey (CUBS) at redshift z ≈ 1. Using the Multi Unit Spectroscopic Explorer integral field spectrograph on the Very Large Telescope, we conduct a deep galaxy redshift survey in the CUBS quasar fields to identify group members and measure the physical properties of individual galaxies and galaxy groups. We find that the CUBS quasars reside in diverse environments. The majority (11 out of 15) of the CUBS quasars reside in overdense environments with typical halo masses exceeding 10$^{13}$M$_{⊙}$, while the remaining quasars reside in moderate-size galaxy groups. No correlation is observed between overdensity and redshift, black hole (BH) mass, or luminosity. Radio-loud quasars (5 out of 15 CUBS quasars) are more likely to be in overdense environments than their radio-quiet counterparts in the sample, consistent with the mean trends from previous statistical observations and clustering analyses. Nonetheless, we also observe radio-loud quasars in moderate groups and radio-quiet quasars in overdense environments, indicating a large scatter in the connection between radio properties and environment. We find that the most UV luminous quasars might be outliers in the stellar mass-to-halo mass relations or may represent departures from the standard single-epoch BH relations.
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hal-04569155 , version 1 (16-05-2024)

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Jennifer I-Hsiu Li, Sean D Johnson, Erin Boettcher, Sebastiano Cantalupo, Hsiao-Wen Chen, et al.. The Cosmic Ultraviolet Baryon Survey (CUBS). VIII. Group Environment of the Most Luminous Quasars at z ≈ 1. The Astrophysical Journal, 2024, 965 (2), pp.143. ⟨10.3847/1538-4357/ad2fad⟩. ⟨hal-04569155⟩
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