The cosmological evolution of the QSO luminosity density and of the star formation rate

Details The cosmological evolution of the QSO luminosity density and of the star formation rate The cosmological evolution of the QSO luminosity density and of the star formation rate

1997-10-14

arxiv.org/abs/astro-ph/9710134v1

Astronomy and Astrophysics

Astrophysics

3 pages, TeX, 1 figure, MNRAS in press

Scientific paper

10.1046/j.1365-8711.1998.01264.x

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.

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