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ON THE DOUBLE NATURED SOLUTIONS OF THE TWO-TEMPERATURE EXTERNAL SOFT PHOTON COMPTONIZED ACCRETION DISKS
(IOP PUBLISHING LTD, 2009)
We have analyzed pair production in the innermost region of a two-temperature external soft photon Comptonized accretion disk. We have shown that, if the viscosity parameter is greater than a critical value alpha(c), the ...
Nonthermal processes in hot accretion flows onto supermassive black holes: an inhomogeneous model
(EDP Sciences, 2021-05)
Context. Many low-redshift active galactic nuclei harbor a supermassive black hole accreting matter at low or medium rates. At such rates, the accretion flow usually consists of a cold optically thick disk, plus a hot, low ...
The role of magnetic reconnection on jet/accretion disk systems
(EDP SCIENCES S A, 2010)
Context. It was proposed earlier that the relativistic ejections observed in microquasars could be produced by violent magnetic reconnection episodes at the inner disk coronal region (de Gouveia Dal Pino & Lazarian 2005). ...
Radiation from hot accretion flows onto black holes
(Asociación Argentina de Astronomía, 2019-08)
The hot accretion flows upon black holes are usually optically thin two-temperature plasmas in which electrons can achieve temperatures up to , producing radiation via synchrotron, bremsstrahlung and inverse Compton, and ...
Particle-in-Cell Simulations of Continuosly Driven Mirror and Ion cycloton Instability in High Beta Astrophysical and Heliospheric Plasmas
(American Astronomical Society, 2015)
We use particle-in-cell simulations to study the nonlinear evolution of ion velocity space instabilities in an
idealized problem in which a background velocity shear continuously amplifies the magnetic field. We simulate
the ...
Misaligned snowplough effect and the electromagnetic counterpart to black hole binary mergers
(2019-01-01)
We estimate the accretion rates produced when a circumprimary gas disc is pushed into the primary supermassive black hole (SMBH) by the tidal force of the decaying secondary during a SMBH merger. Using the 3D Smoothed ...
Precession and accretion in circumbinary discs: the case of HD 104237
(Royal Astronomical Society, 2015)
We present the results of smoothed particle hydrodynamics (SPH) simulations of the disc
around the young, eccentric stellar binary HD 104237. We find that the binary clears out a
large cavity in the disc, driving a ...
MAGNETIC FIELD EFFECTS NEAR THE LAUNCHING REGION OF ASTROPHYSICAL JETS
(WORLD SCIENTIFIC PUBL CO PTE LTD, 2010)
One of the fundamental properties of astrophysical magnetic fields is their ability to change topology through reconnection and in doing so, to release magnetic energy, sometimes violently. In this work, we review recent ...