The spectrum of a single photoionized cloud

Details The spectrum of a single photoionized cloud The spectrum of a single photoionized cloud

2003-07-25

arxiv.org/abs/astro-ph/0307450v1

Quasars & Cosmology, 1999, ASP Conf Ser 162, Gary Ferland & Jack Baldwin, editors

Astronomy and Astrophysics

Astrophysics

review from Quasars & Cosmology, ASP 162, Ferland & Baldwin, editors

Scientific paper

The emission-line spectrum of a quasar is most likely emitted by an ensemble of photoionized clouds moving with a variety of velocities, with a range of densities and distances from the central object. The state of the art in this field is to first compute the emission from a single cloud, and then prescribe a mix of clouds to reproduce line intensities, profiles, and reverberation lags. Here I review the parameters that de-fine emission from a single cloud and the outstanding problems in qua-sar emission-line analysis.

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