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86 papers
Balmer Absorption in Iron Low-Ionization Broad Absorption Line Quasars
Karen M. Leighly, Sarah C. Gallagher, Hyunseop Choi +4
While C IV is the most common absorption line in Broad Absorption Line Quasar spectra, Balmer absorption lines are among the rarest. We present analysis of Balmer absorption in a s…
Massive Extremely High-Velocity Outflow in the Quasar J164653.72+243942.2
Paola Rodríguez Hidalgo, Hyunseop Choi, Patrick B. Hall +6
We present the analysis of one of the most extreme quasar outflows found to date in our survey of extremely high velocity outflows (EHVO). J164653.72+243942.2 (z ~ 3.04) shows vari…
Multi-phase black-hole feedback and a bright [CII] halo in a Lo-BAL quasar at
Manuela Bischetti, Hyunseop Choi, Fabrizio Fiore +18
Although the mass growth of supermassive black holes during the Epoch of Reionisation is expected to play a role in shaping the concurrent growth of their host-galaxies, observatio…
Investigating the {Origin} of the Absorption-Line Variability in Narrow-Line Seyfert 1 Galaxy WPVS 007
Kaylie S. Green, Sarah C. Gallagher, Karen M. Leighly +5
Broad Absorption Line Quasars (BALQs) are actively accreting supermassive black holes that have strong outflows characterized by broad absorption lines in their rest-UV spectra. Va…
The Physical Properties of Low Redshift FeLoBAL Quasars. IV. Optical-Near IR Spectral Energy Distributions and Near-IR Variability Properties
Karen M. Leighly, Hyunseop Choi, Michael Eracleous +3
We present the optical-near infrared spectral energy distributions (SED) and near infrared variability properties of 30 low-redshift iron low-ionization Broad Absorption Line quasa…
The Properties of Low-Redshift FeLoBAL Quasars: III. The Location and Geometry of the Outflows
Hyunseop Choi, Karen M. Leighly, Collin Dabbieri +3
We present continued analysis of a sample of low-redshift iron low-ionization broad absorption-line quasars (FeLoBALQs). Choi et al. (2022) presented spectral analysis of…