OzDES Reverberation Mapping Program: CIV lags from six years of data

TL;DR

This paper reports on the successful measurement of CIV reverberation lags in high-redshift AGN over six years, providing new black hole mass estimates and insights into survey selection effects affecting the radius-luminosity relation.

Contribution

It presents the first large sample of high-redshift CIV reverberation lags and new black hole mass estimates from the OzDES campaign, highlighting survey duration effects.

Findings

29 CIV lags successfully recovered

Black hole masses between 0.8 and 1.3 billion solar masses

Identification of a selection effect impacting the radius-luminosity relation

Abstract

We present 29 successfully recovered CIV time lags in Active Galactic Nuclei from the complete Dark Energy Survey Reverberation Mapping campaign. The AGN in this sample span a redshift range of 1.9<z<3.5. We successfully measure the velocity dispersion from the CIV spectral linewidth for 25 of these 29 sources, and use these to calculate new high-redshift black hole mass estimates, finding masses between 0.8 and 1.3 billion solar masses. We also identify a selection effect due to the duration of the survey that can impact the radius-luminosity relation derived from this and other (high-redshift) data. This paper represents the culmination of the OzDES CIV campaign.