activity
20142024
most citedAn HST/COS survey of molecular hydrogen in DLAs & sub-DLAs at z < 1: Molecular fraction and excitation temperature

43 citations · 218 across the 11 of their papers we have counts for

collaborators

11 papers

astro-ph.GA20241 cited

Cloud-by-cloud Multiphase Investigation of the Circumgalactic Medium of Low-redshift Galaxies

Sameer, Jane C. Charlton, Bart P. Wakker +10

The pervasive presence of warm gas in galaxy halos suggests that the circumgalactic medium (CGM) is multiphase in its ionization structure and complex in its kinematics. Some recen…

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.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.GA202221 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…

astro-ph.GA202030 cited

Cloud-by-cloud, multiphase, Bayesian modeling: Application to four weak, low ionization absorbers

Sameer, J. C. Charlton, J. M. Norris +8

We present a new method aimed at improving the efficiency of component by component ionization modeling of intervening quasar absorption line systems. We carry out cloud-by-cloud,…

astro-ph.GA201637 cited

The Highly Ionized Circumgalactic Medium is Kinematically Uniform Around Galaxies

Nikole M. Nielsen, Glenn G. Kacprzak, Sowgat Muzahid +3

The circumgalactic medium (CGM) traced by OVI doublet absorption has been found to concentrate along the projected major and minor axes of the host galaxies. This su…