We report on a population of X-ray weak quasars with similar UV emission-line properties to those of the remarkable quasar PHL 1811. All radio-quiet PHL 1811 analogs are notably X-ray weak by a mean factor of ~13, with hints of heavy X-ray absorption. Correlations between the X-ray weakness and UV emission-line properties suggest that PHL 1811 analogs may have extreme wind-dominated broad emission-line regions (BELRs). We propose an AGN geometry that can potentially unify the PHL 1811 analogs and the general population of weak-line quasars.
@article{arxiv.1201.3627,
title = {PHL 1811 Analogs: A Population of X-ray Weak Quasars},
author = {Jianfeng Wu and W. N. Brandt and Patrick B. Hall and Robert R. Gibson and Gordon T. Richards and Donald P. Schneider and Ohad Shemmer and Dennis W. Just and Sarah J. Schmidt},
journal= {arXiv preprint arXiv:1201.3627},
year = {2015}
}
Comments
2 pages, 1 figure. Conference proceedings for "AGN Winds in Charleston", Charleston, SC, Oct. 15-18, 2011. To be published by ASP