Quasars with Anomalous Hβ Profiles. I. Demographics

  title={Quasars with Anomalous H$\beta$ Profiles. I. Demographics},
  author={Charles L. Steinhardt and John D. Silverman},
  journal={Publications of the Astronomical Society of Japan},
The Hemission line in a typical Type I quasar is composed of a broad base and a narrow core, with the core velocity characteristic of narrow-line region emission, and line-fitting routines typically assume this picture. We test the effects of removing this constraint, and find a substantial group of Type I quasars in the Sloan Digital Sky Survey catalog with Hemission line cores broader than 1200 km s 1 , above the velocity believed possible for gas in the quasar narrow-line region. We identify… 
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