Astronomy and Astrophysics – Astrophysics
Scientific paper
1997-01-23
Astronomy and Astrophysics
Astrophysics
6 pages, 3 eps figures, Latex+lamuphys.sty, to be published in proceedings of ESO/IAC `Quasar Hosts' conference 24-27 Septembe
Scientific paper
We have obtained deep, near-IR images of nearly 100 host galaxies of nearby quasars and Seyferts. We find the near-IR light to be a good tracer of luminous mass in these galaxies. For the most luminous quasars there is a correlation between the maximum allowed B-band nuclear luminosity and the host galaxy mass, a ``luminosity/host-mass limit''. Comparing our images with images from HST, we find that the hosts of these very luminous quasars are likely early type galaxies, even for radio-quiet objects whose lower-luminosity counterparts traditionally live in spirals. We speculate that the luminosity/host-mass limit represents a physical limit on the size of black hole that can exist in a given galaxy spheroid mass. We discuss the promises of NICMOS for detecting the hosts of luminous quasars.
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