activity
20222026
most citedDirectly tracing cool filamentary accretion over >100 kpc into the interstellar medium of a quasar host at z=1

21 citations · 23 across the 10 of their papers we have counts for

collaborators

10 papers

astro-ph.GA2026

A Comprehensive Study of Morphology and Kinematics in Extended Nebulae Around UV Luminous Quasars at

Zhuoqi Liu, Sean D. Johnson, Eric F. Bell +20

Gas flows between galaxies and the circumgalactic medium (CGM) play a central role in galaxy evolution and can become observable as giant nebulae when illuminated by the quasars. W…

astro-ph.GA2025★ 1 cited

MUSEQuBES: Physical conditions, origins, and multi-element abundances of the circumgalactic medium of an isolated, star-forming dwarf galaxy at z=0.57

Sean D. Johnson, Nishant Mishra, Sowgat Muzahid +13

In dwarf galaxy models, outflows expel metal-enriched interstellar medium (ISM) into the circumgalactic medium (CGM) to reproduce their observed low metallicities, but measurements…

astro-ph.GA2025★ 1 cited

The Morphology and Kinematics of a Giant, Symmetric Nebula Around a Radio-Loud Quasar 3C57: Extended Rotating Gas or Biconical Outflows?

Zhuoqi, Liu, Sean D. Johnson +12

Gas flows between galaxies and the CGM play a crucial role in galaxy evolution. When ionized by a quasar, these gas flows can be directly traced as giant nebulae. We present a stud…

astro-ph.GA2024

The Cosmic Ultraviolet Baryon Survey (CUBS) IX: The enriched circumgalactic and intergalactic medium around star-forming field dwarf galaxies traced by O VI absorption

Nishant Mishra, Sean D. Johnson, Gwen C. Rudie +13

The shallow potential wells of star-forming dwarf galaxies make their surrounding circumgalactic and intergalactic medium (CGM/IGM) sensitive laboratories for studying the inflows…

astro-ph.GA2024

Fast and Flexible Inference Framework for Continuum Reverberation Mapping using Simulation-based Inference with Deep Learning

Jennifer I-Hsiu Li, Sean D. Johnson, Camille Avestruz +5

Continuum reverberation mapping (CRM) of active galactic nuclei (AGN) monitors multiwavelength variability signatures to constrain accretion disk structure and supermassive black h…

astro-ph.GA2024

Discovery of optically emitting circumgalactic nebulae around the majority of UV-luminous quasars at intermediate redshift

Sean D. Johnson, Zhuoqi Will Liu, Jennifer I. Li +15

We report the discovery of large ionized, [O II] emitting circumgalactic nebulae around the majority of thirty UV luminous quasars at observed with deep, wide-field int…

astro-ph.GA2024

The Cosmic Ultraviolet Baryon Survey (CUBS) VIII: Group Environment of the Most Luminous Quasars at

Jennifer I. Li, Sean D. Johnson, Erin Boettcher +12

We investigate the group-scale environment of 15 luminous quasars (luminosity erg s) from the Cosmic Ultraviolet Baryon Survey (CUBS) at redshift $z\a…

astro-ph.GA2023

The first comprehensive study of a giant nebula around a radio-quiet quasar in the Universe

Zhuoqi Will Liu, Sean D. Johnson, Jennifer I-Hsiu Li +10

We present the first comprehensive study of a giant, kpc-scale nebula around a radio-quiet quasar at . The analysis is based on deep integral field spectros…

astro-ph.GA2023

An ensemble study of turbulence in extended QSO nebulae at --1

Mandy C. Chen, Hsiao-Wen Chen, Michael Rauch +10

Turbulent motions in the circumgalactic medium (CGM) play a critical role in regulating the evolution of galaxies, yet their detailed characterization remains elusive. Using two-di…

astro-ph.GA2022★ 21 cited

Directly tracing cool filamentary accretion over >100 kpc into the interstellar medium of a quasar host at z=1

Sean D. Johnson, Joop Schaye, Gregory L. Walth +11

We report the discovery of giant (50-100 kpc) [O II] emitting nebulae with the Multi-Unit Spectroscopic Explorer (MUSE) in the field of TXS 0206-048, a luminous quasar at z=1.13. D…