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Georgia Journal of Science

Article Title

THE CONTINUED VARIABILITY OF ABSORPTION TROUGHS IN NGC 3783**

Abstract

We use archival cosmic origin spectrograph (COS) and space telescope imaging spectrograph (STIS) spectra of NGC 3783 from 2011 and 2013 to explore variability in the absorption troughs of CIV, NV, and Lyman a. The COS spectrum shows clear changes in one of the intrinsic absorption troughs. While the trough has exhibited changes in previous years, we find that the changes are significantly more drastic and complicate a simple picture of radial deceleration. It appears that the material has shows deceleration but the troughs have larger equivalent widths. This could imply that more material has moved into the line-of-sight.

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