Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21537609w&link_type=abstract
American Astronomical Society, AAS Meeting #215, #376.09; Bulletin of the American Astronomical Society, Vol. 42, p.585
Astronomy and Astrophysics
Astronomy
Scientific paper
We investigate the evolution of black hole-galaxy scaling relations in the last 6 Gyr, by measuring black hole mass and galaxy properties, i.e., stellar velocity dispersion and bulge luminosity. Over the last three years, we obtained high S/N Keck spectra of 40 Seyfert 1 galaxies at z 0.4 and z 0.6, to measure stellar velocity dispersion, and HST (ACS and NICMOS) images of the same objects, to measure bulge luminosity from two-dimensional AGN-galaxy decomposition. In addition, we collected HST archival data of 40 luminous quasars at similar redshifts to increase the dynamical range of our sample. We will present the main results on the MBH-sigma and MH-bulge luminosity relations and their evolution to the present-day universe. The measured scaling relations show that the relations evolved significantly in the past 6 billion years, and that black hole growth predates the final galaxy assembly. Detailed analysis on the scatter and slop of the scaling relations, and the mass-dependency of the evolution will be discussed.
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