Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-03-05
Astronomy and Astrophysics
Astrophysics
6 pages, 4 figures, to appear in the proceedings of the workshop on "QSO hosts and their environments", IAA, Granada, 10-12 Ja
Scientific paper
We investigate multicolour imaging data of a complete sample of low redshift (z<0.2) QSO host galaxies. The sample was imaged in four optical (BVRi) and three near-infrared bands (JHKs), and in addition spectroscopic data is available for a majority of the objects. We extract host luminosities for all bands by means of two-dimensional modeling of galaxy and nucleus. Optical and optical-to-NIR colours agree well with the average colours of inactive early type galaxies. The six independent colours are used to fit population synthesis models. We assess the presence of young populations in the hosts for which evidence shows to be very weak.
Jahnke Knud
Kuhlbrodt B.
Orndahl Eva
Wisotzki Luc
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