Ratio of energies radiated in the universe through accretive processes and nucleosynthesis
INTEGRAL Science Data Centre, ch. d'Écogia 16, 1290 Versoix, Switzerland
2 Observatoire de Genève, ch. des Maillettes 51, 1290 Sauverny, Switzerland
Corresponding author: J. A. Zurita Heras, Juan.Zurita@obs.unige.ch
Accepted: 30 July 2003
We present here a new determination of the ratio of energies radiated by active galactic nuclei and by stars and discuss the reasons for the apparently conflicting results found in previous studies. We conclude that the energy radiated by accretion processes onto super massive black holes is about 1 to 5% of the energy radiated by stars. We also estimate that the total mass accreted on average by a super massive black hole at the centre of a typical galaxy is of about .
Key words: galaxies: active / stars: evolution
© ESO, 2003