| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1764713 | Advances in Space Research | 2014 | 7 Pages |
Abstract
In order to investigate where and how low ionization lines are emitted in quasars we are studying a new collection of spectra of the CaII triplet at λ8498, λ8542, λ8662 observed with the Very Large Telescope (VLT) using the Infrared Spectrometer And Array Camera (ISAAC). Our sample involves luminous quasars at intermediate redshift for which CaII observations are almost nonexistent. We fit the CaII triplet and the OI λ8446 line using the Hβ profile as a model. We derive constraints on the line emitting region from the relative strength of the CaII triplet, OI λ8446 and Hβ.
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Physical Sciences and Engineering
Earth and Planetary Sciences
Space and Planetary Science
Authors
Mary Loli Martínez-Aldama, Deborah Dultzin, Paola Marziani, Jack W. Sulentic, Yang Chen, Alessandro Bressan, Giovanna M. Stirpe,