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arXiv:astro-ph/0008492 (astro-ph)
[Submitted on 30 Aug 2000]

Title:Far-Ultraviolet Spectra of AGN: First Results from FUSE

Authors:Gerard A. Kriss
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Abstract: Composite spectra derived from HST observations of moderate redshift (z~1) quasars show that the peak of the spectral energy distribution is at ~1000 A, and that the ionizing continuum falls off smoothly to shorter wavelengths as $f_\nu \sim \nu^{-1.8}$. HUT and FUSE observations of nearby AGN (e.g., 3C 273) show similar results. FUSE spectra reveal a wealth of detail in the 912-1200 A spectral range, including multi-component intrinsic absorption in the O VI doublet and Lyb, and surprisingly strong narrow-line emission from O VI 1032,1038. Monitoring observations of AGN below 1200 A are feasible, and such experiments could help to unravel the structure of intrinsic absorbers in AGN as well as the highest ionization portions of the broad-line region.
Comments: 17 pages, 11 figures, to appear in the proceedings of the GSFC workshop on "Probing the Physics of AGN by Multiwavelength Monitoring"
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:astro-ph/0008492
  (or arXiv:astro-ph/0008492v1 for this version)
  https://doi.org/10.48550/arXiv.astro-ph/0008492

Submission history

From: Gerard A. Kriss [view email]
[v1] Wed, 30 Aug 2000 16:33:08 UTC (294 KB)
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