Outflow and Optical Properties of Low-Redshift FeLoBAL Quasars
Abstract
Outflows in quasars can be observed via emission lines or absorption lines. Broad absorption-line outflows and ionized emission-line outflows have been shown to be located at similar distances from the central engine (parsecs to kiloparsecs), and they are both powered by photoionization of gas with similar physical conditions. Therefore, they could be different manifestations of the same outflowing gas. FeLoBAL quasars comprise a rare class of broad absorption line quasar that displays absorption from MgII and FeII in their spectra. For 0.8<z<1.0, both [OIII] emission and FeII absorption are observed in a single SDSS spectrum. SimBAL spectral synthesis analysis of a sample of 30 low-redshift FeLoBAL quasars objects shows that the observed and predicted [OIII] emission are related only if the global covering fraction depends on distance from the central engine and Seyfert type. A comparison sample of unabsorbed quasars shows distinct optical spectral properties from the FeLoBAL quasars, and within the FeLoBAL quasars there is evidence for two populations.
- Publication:
-
43rd COSPAR Scientific Assembly. Held 28 January - 4 February
- Pub Date:
- January 2021
- Bibcode:
- 2021cosp...43E1622L