Different Velocity Dependences of Physical Conditions of High- and Low-Ionization Lines in Broad-Line Regions

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We present results from a study of high- and low-ionization emission line ratios as a function of projected velocity for a sample of eight active galactic nuclei (AGNs). Our results are based on analysis of high signal-to-noise optical and Hubble Space Telescope (HST) UV spectra. Comparing the emission line ratios to those predicted by photoionization models indicates that the physical conditions responsible for the high-ionization emission lines are consistent with a wind, whereas those of the low-ionization lines are consistent with a virialized disk.
5 pages, 2 figures in AASTeX. To appear in "AGN Physics with the Sloan Digital Sky Survey", ASP Conference Series Vol. 311, 2004, G. T. Richards and P. B. Hall, eds

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Astrophysics

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http://salesiana.dossiersoluciones.com/handle/123456789/7488

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/astro-ph/0403174
 http://arxiv.org/abs/astro-ph/0403174

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arXiv