[On the jet contribution to the AGN cosmic energy budget

Details [On the jet contribution to the AGN cosmic energy budget [On the jet contribution to the AGN cosmic energy budget

2008-12-08

arxiv.org/abs/0812.1562v1

Astronomy and Astrophysics

Astrophysics

7 pages, 3 figures, submitted to MNRAS

Scientific paper

10.1111/j.1365-2966.2009.14557.x

Black holes release energy via the production of photons in their accretion discs but also via the acceleration of jets. We investigate the relative importance of these two paths over cosmic time by determining the mechanical luminosity function (LF) of radio sources and by comparing it to a previous determination of the bolometric LF of active galactic nuclei (AGN) from X-ray, optical and infrared observations. The mechanical LF of radio sources is computed in two steps: the determination of the mechanical luminosity as a function of the radio luminosity and its convolution with the radio LF of radio sources. Even with the large uncertainty deriving from the former, we can conclude that the contribution of jets is unlikely to be much larger than 10% of the AGN energy budget at any cosmic epoch.

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