The cosmic spin of the most massive black holes
Abstract
Under the assumption that jets in active galactic nuclei are powered by accretion and the spin of the central supermassive black hole, we are able to reproduce the radio luminosity functions of high- and low-excitation galaxies. High-excitation galaxies are explained as high-accretion rate but very low spin objects, while low-excitation galaxies have low accretion rates and bimodal spin distributions, with approximately half of the population having maximal spins. At higher redshifts (z~1), the prevalence of high accretion rate objects means the typical spin was lower, while in the present day Universe is dominated by low accretion rate objects, with bimodal spin distributions.
Keywords
Cite
@article{arxiv.1201.6591,
title = {The cosmic spin of the most massive black holes},
author = {Alejo Martinez-Sansigre and Steve Rawlings},
journal= {arXiv preprint arXiv:1201.6591},
year = {2012}
}
Comments
5 pages, 3 figures. Dedicated to Steve Rawlings. Appeared in proceedings of "Astronomy with megastructures: Joint science with the E-ELT and SKA", 10-14 May 2010, Crete, Greece (Eds: Isobel Hook, Dimitra Rigopoulou, Steve Rawlings and Aris Karastergiou)