The growth of supermassive black holes fed by accretion disks

Growing Supermassive Black Holes by Chaotic Accretion

We consider the problem of growing the largest supermassive black holes from stellar–mass seeds at high redshift. Rapid growth without violating the Eddington limit requires that most mass is gained while the hole has a low spin and thus a low radiative accretion efficiency. If, as was formerly thought, the black–hole spin aligns very rapidly with the accretion flow, even a randomly–oriented se...

Spin, Accretion and the Cosmological Growth of Supermassive Black Holes

If supermassive black holes (SMBHs) are the energy sources that power quasars and active galactic nuclei, then QSO SDSS 1148+5251, the quasar with the highest redshift (zQSO = 6.43), hosts a supermassive black hole formed within ∼ 0.9 Gyr after the Big Bang. This requirement places constraints on the cosmological formation of SMBHs, believed to grow from smaller initial seeds by a combination o...

Jet enhanced accretion growth of supermassive black holes

We investigate the effect of a disc-driven jet on the accretion growth of cosmological supermassive black holes (SMBHs). The presence of a jet enhances the mass growth rate because for a given luminosity, the mass accretion rate, Ṁa, is higher (or equivalently, the radiative efficiency ǫr is lower for a fixed Ṁa) than that predicted by standard accretion disc theory. As jets carry away very lit...

Dark Matter Accretion into Supermassive Black Holes

X-ray Emission From Accretion Disks of AGN: Signatures of Supermassive Black Holes

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