Ne (136)
Ano (31)
Počet nalezených dokumentů:
167
Publikováno od
do
Simulating Compton scattering using Monte Carlo method: COSMOC library
Adámek, K.; Bursa, Michal
2014 - anglický
The authors present properties and functionality of the COSMOC library designed to exploit basic features of Compton scattering process and its computational modelling.
Klíčová slova:
Monte Carlo; Compton scattering; C++
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Simulating Compton scattering using Monte Carlo method: COSMOC library
The authors present properties and functionality of the COSMOC library designed to exploit basic features of Compton scattering process and its computational modelling.
Tidal disruption events from a nuclear star cluster as possible origin of transient relativistic spectral lines near SMBH
Karas, Vladimír; Dovčiak, Michal; Kunneriath, Devaky; Yu, W.; Zhang, W.
2014 - anglický
The authors discuss a possibility that a tidal disruption event near a dormant supermassive black hole can give rise to spectral features of iron in 6-7keV X-ray signal.
Klíčová slova:
accretion discs; black hole physics
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Tidal disruption events from a nuclear star cluster as possible origin of transient relativistic spectral lines near SMBH
The authors discuss a possibility that a tidal disruption event near a dormant supermassive black hole can give rise to spectral features of iron in 6-7keV X-ray signal.
Modelling steep radial emissivity in relativistic iron lines from black-hole accretion discs
Svoboda, Jiří; Dovčiak, Michal; Karas, Vladimír; Goosmann, R. W.
2014 - anglický
The authors discuss whether the special conditions on the corona properties are indeed required, and/or whether the steep radial emissivity could be an artefact of model assumptions.
Klíčová slova:
black holes; accretion discs; relativistic iron lines
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Modelling steep radial emissivity in relativistic iron lines from black-hole accretion discs
The authors discuss whether the special conditions on the corona properties are indeed required, and/or whether the steep radial emissivity could be an artefact of model assumptions.
Triggered oscillations and destruction of magnetized relativistic tori in 2D
Hamerský, Jaroslav; Karas, Vladimír
2014 - anglický
The toroidal magnetic field plays a more important role in the early phases of the accretion process until the perturbed configuration finds a new equilibrium or disappears because of the runaway instability. We showed that additional perturbations in the vertical direction can lead to relativistic outflows if the perturbations are strong enough so that the mass could get far from the equatorial plane.
Klíčová slova:
accretion discs; black hole physics
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Triggered oscillations and destruction of magnetized relativistic tori in 2D
The toroidal magnetic field plays a more important role in the early phases of the accretion process until the perturbed configuration finds a new equilibrium or disappears because of the runaway ...
Confronting models of twin peak quasi-periodic oscillations: Mass and spin estimates fixed by neutron star equation of state
Török, G.; Goluchová, K.; Urbanec, M.; Šrámková, E.; Adámek, K.; Urbancová, G.; Pecháček, Tomáš; Bakala, P.; Stuchlík, Z.; Horák, Jiří; Juryšek, J.
2014 - anglický
In the work authors compare simplified calculations that assume Kerr background geometry to the detailed calculations considering NS oblateness influence in Hartle-Thorne spacetimes.
Klíčová slova:
X-rays binaries; accretion discs; equation of state
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Confronting models of twin peak quasi-periodic oscillations: Mass and spin estimates fixed by neutron star equation of state
In the work authors compare simplified calculations that assume Kerr background geometry to the detailed calculations considering NS oblateness influence in Hartle-Thorne spacetimes.
Twin peak quasi-periodic oscillations as signature of oscillating cusp torus
Török, G.; Goluchová, K.; Horák, Jiří; Šrámková, E.; Urbanec, M.; Urbancová, G.; Pecháček, Tomáš; Bakala, P.
2014 - anglický
The authors propose a new model of twin-peak quasi-periodic oscillations.This model considers an oscillating torus with cusp that changes location of its centre around radii very close to innermost stable circular orbit.
Klíčová slova:
X-rays binaries; accretion discs; equation of state
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Twin peak quasi-periodic oscillations as signature of oscillating cusp torus
The authors propose a new model of twin-peak quasi-periodic oscillations.This model considers an oscillating torus with cusp that changes location of its centre around radii very close to innermost ...
Modified Newtonian potentials for particles and fluids in permanent rotation around black holes
Karas, Vladimír; Abramowicz, M. A.
2014 - anglický
Modified Newtonian potentials have been proposed for the description of relativistic effects acting on particles and fluids in permanent orbital motion around black holes.
Klíčová slova:
accretion discs; black hole physics
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Modified Newtonian potentials for particles and fluids in permanent rotation around black holes
Modified Newtonian potentials have been proposed for the description of relativistic effects acting on particles and fluids in permanent orbital motion around black holes.
On oscillations in turbulent accretion disks: I. A general approach
Horák, Jiří
2014 - anglický
In the article a general theory of a wave propagation in a turbulent media is reviewed.
Klíčová slova:
black hole physics; accretion disks; oscillations
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
On oscillations in turbulent accretion disks: I. A general approach
In the article a general theory of a wave propagation in a turbulent media is reviewed.
Effects of environmental drag onto a fast-moving magnetic compact star near a supermassive black hole
Karas, Vladimír; Šubr, L.; Kunneriath, Devaky; Zajaček, Michal
2014 - anglický
The authors discuss whether a strong magnetic field of a neutron star can significantly enhance the drag effect by increasing the effective cross-sectional area for the mutual interaction.
Klíčová slova:
accretion discs; black hole physics
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Effects of environmental drag onto a fast-moving magnetic compact star near a supermassive black hole
The authors discuss whether a strong magnetic field of a neutron star can significantly enhance the drag effect by increasing the effective cross-sectional area for the mutual interaction.
An XSPEC model to explore spectral features from black-hle sources. II. The relativistic iron line in the lamp-post geometry
Dovčiak, Michal; Svoboda, Jiří; Goosmann, R. W.; Karas, Vladimír; Matt, G.; Sochora, Vjačeslav
2014 - anglický
In the paper authors compare the two radial profiles of the line emission - the broken power-law dependence and illumination in the lamp-post scenario.
Klíčová slova:
accretion discs; black hole physics; relativistic processes
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
An XSPEC model to explore spectral features from black-hle sources. II. The relativistic iron line in the lamp-post geometry
In the paper authors compare the two radial profiles of the line emission - the broken power-law dependence and illumination in the lamp-post scenario.
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