Unusual Broad Absorption Line Quasars from the Sloan Digital Sky Survey

@article{Hall2002UnusualBA,
  title={Unusual Broad Absorption Line Quasars from the Sloan Digital Sky Survey},
  author={Patrick B. Hall and Scott F. Anderson and Michael A. Strauss and Donald G. York and Gordon T. Richards and Xiaohui Fan and Gillian R. Knapp and Donald P. Schneider and Daniel E. vanden Berk and Thomas R. Geballe and Amanda. E. Bauer and Robert H. Becker and Marc Davis and Hans–Walter Rix and Robert C. Nichol and Neta A. Bahcall and Jonathan Brinkmann and Robert J. Brunner and Andrew J. Connolly and Istv{\'a}n Csabai and Mamoru Doi and Masataka Fukugita and James E. Gunn and Zolt{\'a}n Haiman and Michael Harvanek and Timothy M. Heckman and Gregory S. Hennessy and Naohisa Inada and Željko Ivezi{\'c} and David E. Johnston and Scott J. Kleinman and Julian H. Krolik and Jurek Krzesinski and Peter Z. Kunszt and Donald Q. Lamb and Daniel C. Long and Robert H. Lupton and Gajus A. Miknaitis and Jeffrey A. Munn and Vijay K. Narayanan and Eric H. Neilsen and P. R. Newman and Atsuko Nitta and Sadanori Okamura and Laura Pentericci and Jeffrey R. Pier and David J. Schlegel and Stephanie A. Snedden and Alexander S. Szalay and Anirudda R. Thakar and Zlatan I. Tsvetanov and Richard L. White and Wei Zheng},
  journal={The Astrophysical Journal Supplement Series},
  year={2002},
  volume={141},
  pages={267 - 309}
}
The Sloan Digital Sky Survey has confirmed the existence of populations of broad absorption line (BAL) quasars with various unusual properties. We present and discuss 23 such objects and consider the implications of their wide range of properties for models of BAL outflows and quasars in general. We have discovered one BAL quasar with a record number of absorption lines. Two other similarly complex objects with many narrow troughs show broad Mg II absorption extending longward of their systemic… 

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