On the jet contribution to the active galactic nuclei cosmic energy budget

A. Cattaneo, P. N. Best

Research output: Contribution to journalArticlepeer-review

Abstract

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 similar to 10 per cent of the AGN energy budget at any cosmic epoch.

Original languageEnglish
Pages (from-to)518-523
Number of pages6
JournalMonthly Notices of the Royal Astronomical Society
Volume395
Issue number1
DOIs
Publication statusPublished - 1 May 2009

Keywords

  • black hole physics
  • galaxies: active
  • galaxies: jets
  • RADIO LUMINOSITY FUNCTION
  • SUPERMASSIVE BLACK-HOLES
  • GALAXY REDSHIFT SURVEY
  • ELLIPTIC GALAXIES
  • COOLING FLOWS
  • RADIATIVE EFFICIENCY
  • ACCRETION RATE
  • 1.4 GHZ
  • AGN
  • FEEDBACK

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