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      Permanent link:
      https://www.ias.ac.in/article/fulltext/joaa/036/04/0457-0465

    • Keywords

       

      Quasars: general; quasars: emission lines; lines: profiles; star formation.

    • Abstract

       

      We present a new spectroscopic sample of 11 quasars at intermediate redshift observed with the Infrared Spectrometer and Array Camera (ISAAC) on the ESO Very Large Telescope (VLT), covering O ${\rm\tiny I}$ 𝜆8446 and the Ca ${\rm\tiny II}$ triplet 8498, 8542, 8662. The new observations – that supplement the sample presented by Martínez-Aldama et al. (2015) – allow us to confirm the constraints on physical conditions and location of the region emitting the low ionization lines, as well as the relation between Ca ${\rm\tiny II}$ and Fe ${\rm\tiny II}$.

    • Author Affiliations

       

      Mary Loli Martínez-Aldama1 Paola Marziani2 Deborah Dultzin1 Jack W. Sulentic3 Alessandro Bressan4 Yang Chen4 Giovanna M. Stirpe5

      1. Instituto de Astronomía, Universidad Nacional Autónoma de México, Aptdo. Postal 70-264, México, D.F. 04510, Mexico.
      2. INAF, Osservatorio Astronomico di Padova, Vicolo dell Osservatorio 5, 35122 Padova, Italy.
      3. Instituto de Astronomía de Andalucía (CSIC), C/ Camino Bajo de Huetor 50, 18008 Granada, Spain.
      4. Scuola Internazionale Superiore di Studi Avanzati (SISSA), via Bonomea 265, I-34136 Trieste, Italy.
      5. INAF, Osservatorio Astronomico di Bologna, via Ranzani 1, 40127 Bologna, Italy.
    • Dates

       
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