Five newly characterized quasar absorption outflows in DESI spectra sit 4.5 to 31 kpc from their nuclei, and the most energetic (J1407 S1) reaches about 0.47% of Eddington luminosity, near the feedback threshold.
Partial Coverage and Time Variability of Narrow-Line Intrinsic QSO Absorption Systems
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abstract
It is possible to distinguish ``intrinsic'' absorption systems (gas clouds within the quasar environment) from ``intervening'' systems (gas clouds unrelated to the quasar phenomenon) by considering certain observational properties. We find that the most direct determinations of the intrinsic nature of a system are time variability and partial coverage of the background light source by the absorption region. Both of these conditions are unlikely to occur in intervening systems. We present Keck and HIRES data which demonstrate both these phenomena. We also summarize a list of several other observational properties which appear to be indicative of ``intrinsic'' systems.
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Quasar absorption outflows on galactic scales: Insights from DESI
Five newly characterized quasar absorption outflows in DESI spectra sit 4.5 to 31 kpc from their nuclei, and the most energetic (J1407 S1) reaches about 0.47% of Eddington luminosity, near the feedback threshold.