Margrethe Wold (ITA): Dust-obscured quasars as probes of galaxy evolution

Fredagskollokvium

Abstract

Much progress has been made in measuring black hole masses in (non-active) galactic nuclei using the tight correlation between stellar velocity dispersions in galaxies and the mass of their central black hole. The use of this correlation in quasars, however, is hampered by the difficulty in measuring velocity dispersions in host galaxies that tend to be overpowered by their bright nuclei. We discuss results from a project that focuses on z~0.3 quasars suffering from heavy extinction at shorter wavelengths. Our preliminary results show dust-obscured red quasars have, on average, lower velocity dispersions than local galaxies. We discuss possible biases and systematic errors that may affect our results.

Publisert 11. aug. 2009 13:00 - Sist endret 15. juni 2011 13:49