A self-consistent hybrid Comptonization model for broad-band spectra of accreting supermassive black holes

@article{Veledina2010ASH,
  title={A self-consistent hybrid Comptonization model for broad-band spectra of accreting supermassive black holes},
  author={Alexandra Veledina and Indrek Vurm and Juri Poutanen},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2010},
  volume={414},
  pages={3330-3343}
}
The nature of the broad-band spectra of supermassive accreting black holes in active galactic nuclei (AGNs) is still unknown. The hard X-ray spectra of Seyferts as well as of Galactic stellar-mass black holes (GBHs) are well represented by thermal Comptonization, but the origin of the seed photons is less certain. The MeV tails observed in GBHs provide evidence in favour of non-thermal electron tails and it is possible that such electrons are also present in the X-ray-emitting regions of AGNs… 
ON THE NATURE OF THE X-RAY CORONA OF BLACK HOLE BINARIES
We discuss the nature of the X-ray emitting plasma of black hole binaries. It is well known that the temperature and optical depth of the Comptonising electrons of the X-ray corona of black hole
Properties of AGN coronae in the NuSTAR era – II. Hybrid plasma
The corona, a hot cloud of electrons close to the centre of the accretion disc, produces the hard X-ray power-law continuum commonly seen in luminous Active Galactic Nuclei (AGN). The continuum has a
On the Role and Origin of Nonthermal Electrons in Hot Accretion Flows
We study the X-ray spectra of tenuous, two-temperature accretion flows using a model involving an exact, Monte Carlo computation of the global Comptonization effect as well as a general relativistic
A SYNCHROTRON SELF-COMPTON-DISK REPROCESSING MODEL FOR OPTICAL/X-RAY CORRELATION IN BLACK HOLE X-RAY BINARIES
The physical picture of the emission mechanisms operating in the X-ray binaries was put under question by the simultaneous optical/X-ray observations with high time resolution. The light curves of
X-ray spectra of hot accretion flows
We study radiative properties of hot accretion flows in a general relativistic model with an exact treatment of global Comptonization, developed in our recent works. We note a strong dependence of
A comprehensive analysis of the hard X-ray spectra of bright Seyfert galaxies
Hard X-ray spectra of 28 bright Seyfert galaxies observed with INTEGRAL were analysed together with the X-ray spectra from XMM–Newton, Suzaku and RXTE. These broad-band data were fitted with a model
NuSTAR Reveals the Comptonizing Corona of the Broad-Line Radio Galaxy 3C 382
Broad-line radio galaxies (BLRGs) are active galactic nuclei that produce powerful, large-scale radio jets, but appear as Seyfert 1 galaxies in their optical spectra. In the X-ray band, BLRGs also
Hot accretion flow in black hole binaries: a link connecting X-rays to the infrared
Multiwavelength observations of Galactic black hole transients have opened a new path to understanding the physics of the innermost parts of the accr etion flows. While the processes giving rise to
The X-ray Polarization of the Accretion Disk Coronae of Active Galactic Nuclei
Hard X-rays observed in Active Galactic Nuclei (AGNs) are thought to originate from the Comptonization of the optical/UV accretion disk photons in a hot corona. Polarization studies of these photons
Particle transport in magnetized media around black holes and associated radiation
Context. Galactic black hole coronae are composed of a hot, magnetized plasma. The spectral energy distribution produced in this component of X-ray binaries can be strongly affected by different
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 82 REFERENCES
ON THE ORIGIN OF SPECTRAL STATES IN ACCRETING BLACK HOLES
The origin of dramatically different electron distributions responsible for Comptonization in black hole X-ray binaries (BHBs) in their various states is discussed. We solve the coupled kinetic
The synchrotron boiler and the spectral states of black hole binaries
We discuss the origin of the very different hard X-ray spectral shapes observed in the low hard state (LHS) and high soft state (HSS) of accreting black holes. We study the effects of synchrotron
High-energy X-ray spectra of Seyferts and Unification schemes for active galactic nuclei
The Unified Model of active galactic nuclei (AGN) predicts that the sole difference between type 1 and 2 Seyfert galaxies nuclei is the viewing angle with respect to an obscuring structure around the
A MODEL FOR THE X-RAY AND ULTRAVIOLET EMISSION FROM SEYFERT GALAXIES AND GALACTIC BLACK HOLES
We propose that the X--ray emission from radio quiet AGN and galactic black holes is due to Comptonization of soft thermal photons emitted by the underlying accretion disk in localized structures
Effects of non-thermal tails in Maxwellian electron distributions on synchrotron and Compton processes
We investigate how the presence of a non-thermal tail beyond a Maxwellian electron distribution affects the synchrotron process as well as Comptonization in plasmas with parameters typical for
Thermal synchrotron radiation and its Comptonization in compact X-ray sources
We investigate the process of synchrotron radiation from thermal electrons at semirelativistic and relativistic temperatures. We find an analytic expression for the emission coefficient for random
Nonthermal Electrons in Radiatively Inefficient Accretion Flow Models of Sagittarius A
We investigate radiatively inefficient accretion flow models for Sgr A*, the supermassive black hole in our Galactic center, in light of new observational constraints. Confirmation of linear
Full radiative coupling in two-phase models for accreting black holes
The emission from galactic black holes and Seyfert galaxies is generally understood in term of two-phase models (Haardt & Maraschi 1991, 1993). Such models postulate that a hot plasma (∼10 9 K)
An XMM-Newton observation of Ton S180: constraints on the continuum emission in ultrasoft Seyfert galaxies
We present an XMM-Newton observation of the bright, narrow-line, ultrasoft type 1 Seyfert galaxy Ton S180. The 0.3-10 keV X-ray spectrum is steep and curved, showing a steep slope above 2.5 keV (r ∼
Unification of Spectral States of Accreting Black Holes
Several galactic black holes show transitions between spectral states. The nature of these transitions is not fully understood yet. None of the dynamical accretion disk models can fully describe
...
1
2
3
4
5
...