Astronomy and Astrophysics – Astrophysics
Scientific paper
1997-06-26
Astronomy and Astrophysics
Astrophysics
TeX, 7 pages, 2 Postscript figures included, using macro lecproc.sty (also included). To appear in the Proceedings of the Conf
Scientific paper
Most quasars are known to be radio quiet and according to the ``spin paradigm'', which connects their radio-loudness with the value of the black hole spin, they must harbor very slowly rotating black holes. On the other hand, quasars are powered by accretion which tends to increase the spin of the black hole. We show that the Blandford-Znajek mechanism is not efficient enough to counteract the spinning up of black holes by an accretion disk, regardless of the accretion rate. We establish conditions under which it is possible to obtain low values of the black hole spin, in the scenario involving a sequence of many accretion events with random angular momenta. Our results are used to select possible evolutionary scenarios which can explain radio bimodality of quasars in terms of the ``spin paradigm''.
Lasota Jean-Pierre
Moderski Rafal
Sikora Marek
No associations
LandOfFree
On Black Hole Spins and Dichotomy of Quasars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with On Black Hole Spins and Dichotomy of Quasars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On Black Hole Spins and Dichotomy of Quasars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-227443