2 research outputs found
Discovery of a z=0.65 post-starburst BAL quasar in the DES supernova fields
We present the discovery of a z = 0.65 low-ionization broad absorption line (LoBAL) quasar
in a post-starburst galaxy in data from the Dark Energy Survey (DES) and spectroscopy from
the Australian Dark Energy Survey (OzDES). LoBAL quasars are a minority of all BALs, and
rarer still is that this object also exhibits broad Fe II (an FeLoBAL) and Balmer absorption.
This is the first BAL quasar that has signatures of recently truncated star formation, which
we estimate ended about 40 Myr ago. The characteristic signatures of an FeLoBAL require
high column densities, which could be explained by the emergence of a young quasar from
an early, dust-enshrouded phase, or by clouds compressed by a blast wave. The age of the
starburst component is comparable to estimates of the lifetime of quasars, so if we assume the
quasar activity is related to the truncation of the star formation, this object is better explained
by the blast wave scenario
Discovery of a z=0.65 post-starburst BAL quasar in the DES supernova fields
We present the discovery of a z = 0.65 low-ionization broad absorption line (LoBAL) quasar in a post-starburst galaxy in data from the Dark Energy Survey (DES) and spectroscopy from the Australian Dark Energy Survey (OzDES). LoBAL quasars are a minority of all BALs, and rarer still is that this object also exhibits broad Fe ii (an FeLoBAL) and Balmer absorption. This is the first BAL quasar that has signatures of recently truncated star formation, which we estimate ended about 40 Myr ago. The characteristic signatures of an FeLoBAL require high column densities, which could be explained by the emergence of a young quasar from an early, dust-enshrouded phase, or by clouds compressed by a blast wave. The age of the starburst component is comparable to estimates of the lifetime of quasars, so if we assume the quasar activity is related to the truncation of the star formation, this object is better explained by the blast wave scenario