X-Ray Absorption Associated with High-Velocity UV Absorbers
Abstract
We present Chandra observations of two radio-quiet QSOs, PG 2302+029 and PG 1254+047. PG 2302+029 has an ultra high-velocity UV absorption system -56,000 km/s, while PG 1254+047 is a Broad Absorption Line (BAL) QSO with detached troughs. Both objects are X-ray weak, consistent with the known correlation between alpha_ox and the strength of the UV absorption lines. The data suggest that there is evidence that both objects are intrinsically weak X-ray sources, in addition to being heavily X-ray absorbed. The X-ray absorption column densities are N_H > 10^22 cm^-2 for neutral gas and the intrinsic emission spectra have alpha_ox > 2. The data are fit best by including ionized (rather than neutral) absorbers, with column densities N_H(PG2302) > 2.98 x 10^22 cm^-2 and N_H(PG1254) > 17.3 x 10^22 cm^-2. The degrees of ionization are consistent with the UV lines, as are the total column densities if the strongest lines are saturated.
Keywords
Cite
@article{arxiv.astro-ph/0105279,
title = {X-Ray Absorption Associated with High-Velocity UV Absorbers},
author = {B. M. Sabra and F. Hamann and J. C. Shields and I. George and B. Jannuzi},
journal= {arXiv preprint arXiv:astro-ph/0105279},
year = {2007}
}
Comments
to appear in Mass Outflows in Active Galactic Nuclei: New Perspectives, ASP Conf. Series, eds. D. M. Crenshaw, S. B. Kraemer, I. M. George