The cosmological evolution of the QSO luminosity density and of the star formation rate
arXiv:astro-ph/9710134 · doi:10.1046/j.1365-8711.1998.01264.x
Abstract
We demonstrate that the evolution of the QSO luminosity density with epoch displays a striking similarity to the cosmological evolution of the field galaxy star formation rate, recently derived from a number of independent surveys. The QSO luminosity density at 2800A is approximately one-fortieth that implied by the star formation rate in galaxies throughout the past 11 Gigayears (z<4). This similarity suggests that a substantial fraction of the QSO luminosity may be closely linked to the star formation process and its evolution with cosmic time.
3 pages, TeX, 1 figure, MNRAS in press