Intrinsic Absorption with the Far Ultraviolet Spectroscpoic Explorer

Mr. Jay Dunn

Department of Physics & Astronomy

Georgia State University

Nov. 13, 2007

Tuesday 3:30 - 4:30 pm; 218 NSC

PhD Defense

Abstract:

We present a survey of 72 Seyfert galaxies and quasars observed by the FUSE. The fraction of Seyfert 1 galaxies and low-redshift quasars at z<0.15 that show evidence of intrinsic UV absorption is ~50%. With this fraction we find a global covering factor of the absorbing gas with respect to the central nucleus of $\sim$0.4. We have characterized the relation between luminosity and maximum velocity and shown the correlation to be consistent with that of other surveys. We have also explored each object with multiple observations for variablity in EW, velocity and FWHM and characterized the variations of EW with continuum flux. IRAS F22456-5125 is one particular Seyfert galaxy that we have selected for modelling due to its interesting assortment of intrinsic absorption lines. It shows a system of five individual kinematic components of absorption features in both O~VI lines and in several of the Lyman series lines. We find that each of the components are relatively simple to model and appear to be weak in the X-Ray..