Intrinsic Absorption Properties in Active Galaxies Observed with the Far Ultraviolet Spectroscopic Explorer

Abstract

In a continuing survey of active galactic nuclei observed by the Far Ultraviolet Spectroscopic Explorer, we provide a deeper analysis of intrinsic absorption features found in 35 objects. Our survey is for low-redshift and moderate-luminosity objects, mostly Seyfert galaxies. We find a strong correlation between maximum radial velocity and luminosity. We also examine the relationships between equivalent width (EW), full width at half maximum, velocity: and continuum flux. The correlation between velocity and luminosity has been explored previously by Laor & Brandt, but at a significantly higher redshift and heavily weighted by broad absorption line quasars. We also have examined each object with multiple observations for variability in each of the aforementioned quantities, and have characterized the variation of EW with the continuum flux. In our survey, we find that variability of O VI lambda1032, lambda1038 is less common than of the UV doublets of CIV and N V seen at longer wavelengths, because the O VI absorption is usually saturated. Lyman beta absorption variability is more frequent. In a target-by-target examination we find that broad absorption line absorption and narrow absorption line absorbers are related in terms of maximum outflow velocity and luminosity, and both can be exhibited in similar luminosity objects. We also find one object that shows radial velocity change, seven objects that show equivalent width variability, and two objects that show either transverse velocity changes or a change in ionization.

56 pages, 23 figures, Accepted for AJ, 2008 May 19

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• Mass Outflow in the Seyfert 1 Galaxy NGC 5548
• Search for Molecular Outflows in Local Volume AGN with Herschel-PACS
• The Ultra-Fast Outflow of the Quasar PG 1211+143 as Viewed by Time-Averaged Chandra Grating Spectroscopy
• A High Resolution View of the Warm Absorber in the Quasar MR2251-178
• Discovery of the Transition of a Mini-Broad Absorption Line into Broad Absorption in the SDSS Quasar J115122.14+020426.3
• A broad-band X-ray view of the Warm Absorber in radio-quiet quasar MR2251-178
• Survey of Extremely High-velocity Outflows in Sloan Digital Sky Survey Quasars
• Strong UV and X-ray variability of the Narrow Line Seyfert 1 Galaxy WPVS 007 -- on the nature of the X-ray low state
• Simultaneous XMM-\textit{Newton} and HST-COS observation of 1H0419-577: II. Broadband spectral modeling of a variable Seyfert galaxy
• Ultraviolet and X-ray Variability of the Seyfert 1.5 Galaxy Markarian 817
• Multi-wavelength observations of the obscuring wind in the radio-quiet quasar MR 2251-178
• Galactic Winds across the Gas-Rich Merger Sequence: I. Highly Ionized N V and O VI Outflows in the QUEST Quasars
• Characterization of the emitting and absorbing media around the nucleus of the active galaxy UGC11763 using XMM-Newton data
• Chandra and XMM-Newton view of the Warm Absorbing Gas in Mrk 290
• Observations of Outflowing UV Absorbers in NGC 4051 with the Cosmic Origins Spectrograph
• Connection between Emission and Absorption Outflows through the Study of Quasars with Extremely-High Velocity Outflows
• The puzzling X-ray continuum of the quasar MR 2251-178
• A Search for H I Lyman $\alpha$ Counterparts to Ultra-Fast X-ray Outflows
• Evolution of the Outflows in NGC 3516
• The story of Seyfert galaxy RE J2248-511: from intriguingly ultrasoft to unremarkably average
• Strong Optical and UV Intermediate-Width Emission Lines in the Quasar SDSS J232444.80-094600.3: Dust-Free and Intermediate-Density Gas at the Skin of Dusty Torus ?