A low-luminosity type-1 QSO sample - I. Overluminous host spheroidals or undermassive black holes?

  title={A low-luminosity type-1 QSO sample - I. Overluminous host spheroidals or undermassive black holes?},
  author={G. Busch and Jens Zuther and M{\'o}nica Valencia-S. and Lydia Moser and Sebastian Fischer and Andreas Eckart and Julia Scharwachter and Dimitri A. Gadotti and Lutz Wisotzki I. Physikalisches Institut and University of Cologne and Deutsche Forschungsanstalt f{\"u}r Luft und Raumfahrt and Max--Planck--Institut fur Radioastronomie and Bonn and Observatoire de Paris and Lerma and Eso Santiago de Chile and Leibniz-Institut fur Astrophysik and Potsdam},
  journal={Astronomy and Astrophysics},
Recognizing the properties of the host galaxies of quasi-stellar objects (QSOs) is essential to understand the suspected coevolution of central supermassive black holes (BHs) and their host galaxies. We selected a subsample of the Hamburg/ESO survey for bright UV-excess QSOs, containing only the 99 nearest QSOs with redshift z<=0.06, that are close enough to allow detailed structural analysis. From this "low-luminosity type-1 QSO sample", we observed 20 galaxies and performed aperture… 
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