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On the orientation and magnitude of the black hole spin in galactic nuclei
M. Dotti, M. Colpi, S. Pallini +2
Massive black holes in galactic nuclei vary their mass M and spin vector J due to accretion. In this study we relax, for the first time, the assumption that accretion can be either…
Massive black holes in central cluster galaxies
Marta Volonteri, Luca Ciotti
We explore how the co-evolution of massive black holes (MBHs) and galaxies is affected by environmental effects, addressing in particular MBHs hosted in the central galaxies of clu…
The evolution of active galactic nuclei and their spins
Marta Volonteri, Marek Sikora, Jean-Pierre Lasota +1
Massive black holes (MBHs) in contrast to stellar mass black holes are expected to substantially change their properties over their lifetime. MBH masses increase by several order o…
Black Holes in the Early Universe
Marta Volonteri, Jillian Bellovary
The existence of massive black holes was postulated in the sixties, when the first quasars were discovered. In the late nineties their reality was proven beyond doubt, in the Milky…
The first massive black holes
Marta Volonteri
I briefly outline recent theoretical developments on the formation of the first massive black holes (MBHs) that may grow into the population of MBHs powering quasars and inhabiting…
Limits on the high redshift growth of massive black holes
R. Salvaterra, F. Haardt, M. Volonteri +1
We place firm upper limits on the global accretion history of massive black holes at z>5 from the recently measured unresolved fraction of the cosmic X-ray background. The maximum…