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26 April 2024 |
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The Connection between Ultraviolet and X-ray Outflows in AGN: the case of PDS 456 | | Paul T. O’Brien
; James N. Reeves
; Chris Simpson
; Martin J. Ward
; | | Date: |
14 Mar 2005 | | Subject: | astro-ph | | Affiliation: | University of Leicester), James N. Reeves (JHU/NASA-GSFC), Chris Simpson (University of Durham), Martin J. Ward (University of Durham | | Abstract: | High-velocity outflows from AGN are a well-known phenomena in terms of the Broad Absorption Lines seen in the UV/optical. More recently, similar, possibly related, outflows have been reported in the X-ray. The most extreme example is seen in the nearby, luminous QSO PDS 456, which displays a massive, high velocity (50000 km s-1), high-ionization X-ray outflow of 10 solar masses yr-1. Here we present the UV spectrum of PDS 456 as observed by the Hubble Space Telescope. We find the UV spectrum is also extreme, displaying very broad emission-lines, with CIV 1549 blueshifted by 5000 km s-1 and a broad Ly-alpha absorption trough blueshifted by 14000-24000 km s-1. No strong, broad high-ionization absorption features are seen. We interpret the combined UV and X-ray spectrum of PDS 456 as the signature of a decelerating, cooling outflow, which may be driven by radiation and/or magnetic field. This outflow may be the source of some of the broad emission and absorption-line gas. | | Source: | arXiv, astro-ph/0503293 | | Services: | Forum | Review | PDF | Favorites | |
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