Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-02-24
Astronomy and Astrophysics
Astrophysics
5 pages, 2 color figures. To appear in the proceedings of "Relativistic Astrophysics and Cosmology - Einstein's Legacy" (Eds.:
Scientific paper
We compare all the available observational data on the redshift evolution of the total stellar mass and star formation rate density in the Universe with the mass and accretion rate density evolution of supermassive black holes, estimated from the hard X-ray selected luminosity function of quasars and active galactic nuclei. We find that on average black hole mass must have been higher at higher redshift for given spheroid stellar mass. Moreover, we find negative redshift evolution of the disk/irregulars to spheroid mass ratio. The total accretion efficiency is constrained to be between 0.06 and 0.12, depending on the exact value of the local SMBH mass density, and on the critical accretion rate below which radiatively inefficient accretion may take place.
Di Matteo Tiziana
Merloni Andrea
Rudnick Gregory
No associations
LandOfFree
The parallel lives of supermassive black holes and their host galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The parallel lives of supermassive black holes and their host galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The parallel lives of supermassive black holes and their host galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-223501