Reconstructing the Cosmic Evolution of Quasars from the Age Distribution of Local Early-Type Galaxies

Details Reconstructing the Cosmic Evolution of Quasars from the Age Distribution of Local Early-Type Galaxies Reconstructing the Cosmic Evolution of Quasars from the Age Distribution of Local Early-Type Galaxies

2006-10-24

arxiv.org/abs/astro-ph/0610723v1

Astronomy and Astrophysics

Astrophysics

Submitted to ApJ

Scientific paper

We use the spectra of 22,000 nearby early-type galaxies from the Sloan Digital Sky Survey (SDSS) to determine the age distribution of these galaxies as a function of their velocity dispersion sigma_v in the range 100 km/s < sigma_v < 280 km/s. We then combine the inferred age-distributions with the local abundance of spheroids, including early-type galaxies and late-type bulges, to predict the evolution of the quasar luminosity function (LF) in the redshift range 0 at fixed sigma_v. These assumptions require that the SMBH remnants of quasars with bolometric luminosity below L_bol=10^{12.5} f_Edd L_sun reside predominantly in bulges of late type galaxies. We find that evolution of the observed quasar LF can be fit over the entire redshift range in this simple model, 0=0.3-0.5. We find no evidence that any of the model parameters evolves with redshift, supporting the strong connection between the formation of stars and nuclear SMBHs in spheroids.

Affiliated with

Also associated with

No associations

Rating

Reconstructing the Cosmic Evolution of Quasars from the Age Distribution of Local Early-Type 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 Reconstructing the Cosmic Evolution of Quasars from the Age Distribution of Local Early-Type Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reconstructing the Cosmic Evolution of Quasars from the Age Distribution of Local Early-Type Galaxies will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-377871