SimBAL: Spectral Synthesis Analysis of Broad Absorption Line Quasars

11/12/2020 - 4:00pm to 5:00pm
Speaker(s) / Presenter(s): 
Karen Leighly (University of Oklahoma)
Type of Event (for grouping events):
A significant fraction of quasars exhibit blueshifted broad
absorption lines (BALs) in their rest-UV spectra, indicating powerful
outflows emerging from the central engine. Despite more than 50 years
of study, the physical conditions of the outflowing gas are poorly
understood.  Our group has developed SimBAL, a novel spectral
synthesis fitting method for BAL quasar spectra that uses Bayesian
model calibration to compare synthetic to observed spectra. I will
describe the construction of SimBAL, and illustrate its unique
strengths by discussing the results from several projects.