AC3 - Accretion discs and jets |
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Speaker |
Pugliese, Daniela |
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Coauthors |
Pugliese, Daniela; Zdenek Stuchlík |
| Talk Title |
Multi-accretion events from corotating and counterrotating SMBHs tori |
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Abstract |
Ringed accretion disks (RADs), are aggregates of corotating and counterrotating toroidal accretion disks orbiting around a central Kerr super-massive Black Hole (SMBH) in AGNs. The dimensionless spin of the central BH and the fluids relative rotation proved to strongly affect the RAD dynamics. More generally there is evidence of a strict correlation between SMBH spin, fluid rotation and magnetic fields in RADs formation and evolution. Recently, the model was extended to consider RADs constituted by several magnetized accretion tori and the effects of a toroidal magnetic field in RAD dynamics have been investigated. The analysis poses constraints on tori formation and emergence of RADs instabilities in the phases of accretion onto the central attractor and tori collision emergence. Magnetic fields and fluids rotation are proved to be strongly constrained and influence tori formation and evolution in RADs, depending on the toroidal magnetic fields parameters. Eventually the RAD frame investigation constraints specific classes of tori that could be observed around some specific SMBHs identified by their dimensionless spin. Main references: D. Pugliese, Z. Stuchlík. Astrophys.J.Suppl. 229 (2017) no.2, 40; D. Pugliese, Z. Stuchlík Astrophys.J.Suppl. 221 (2015) 25; D Pugliese G Montani MNRAS, 476, 4, (2018), 4346–4361. |
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