The quasar MBH-Mhost relation through cosmic time - I. Data set and black hole masses
Falomo, R.; Treves, A.; Decarli, R.; Scarpa, R.; Kotilainen, J. K.; Labita, M.
Italy, Finland, Spain
Abstract
We study the relation as a function of cosmic time in a sample of 96 quasars from z = 3 to the present epoch. In this paper, we describe the sample, the data sources and the new spectroscopic observations. We then illustrate how we derive from single-epoch spectra, pointing out the uncertainties in the procedure. In a companion paper, we address the dependence of the ratio between the black hole mass and the host-galaxy luminosity and mass on cosmic time.