Influence of the black hole rotation on accretion discs and jets in active galaxies: the case of NGC 1068

Caproni, Anderson; Abraham, Z.; Cuesta, Herman J. Mosquera

doi:10.1590/s0103-97332005000700044

Cited by 3 publications

(3 citation statements)

References 28 publications

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“…Warped disk candidates and their observational parameters. in units of R g ; 1Kartje et al (1999); 2 Kuo (2011);3 Caproni et al (2005) (note that the tilt angle Δ θ = θ0 − θ1 = 10 o ± 14 o is in a good concordance with the value of Δθ ≈ 11 o mentioned there);…”

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confidence: 55%

Searching for warped disk AGN candidates

et al. 2017

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Mapping the maser emission of subnuclear regions of active galactic nuclei (AGN) enable us to determine some interesting details of the geometry of the accretion disks (AD) under the condition that they have “maser skin”. Additional information about disk warp in the innermost zone near the central black hole (BH) can be disclosed by means of modeling the shape of the relativistically broadened iron emission lines in the energy range 6-7 keV. Here we analyze the influence of the AD geometry (warp) on the shape of the set of relativistically broadened emission lines, as well as consider some examples of AGNs identified by maser mapping techinque as warped and having the complex shape of iron lines near 6.4 keV.

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confidence: 55%

Searching for warped disk AGN candidates

et al. 2017

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“…[3]. (See also the list of papers [4][5][6][7], in which we extend these results to the analysis of some other specific AGN sources, and to confront the B-P scenario for AGN with alternative mechanisms to explain the helicoidal motion of jet components and the disk warping). Therein we have shown that for a large sample of AGN the observed disk and/or jet precession can be consistently explained as driven by the B-P effect.…”

Section: Astrophysical Motivationmentioning

confidence: 77%

“…Therefore, this phenomenology, properly up-scaled in size and mass, may be useful in the understanding of the dynamics of most accretion disks). For larger amplitude SAWs, the mountain 4 The Weber number is a dimensionless number in fluid mechanics that is often useful in analysing fluid flows where there is an interface between two different fluids, especially for multiphase flows with strongly curved surfaces. It can be thought of as a measure of the relative importance of the fluid's inertia compared to its surface tension.…”

Section: A Potential Mechanism For Production Of Jets In Agn: Surfacementioning

confidence: 99%

Gravitational Waves Produced by Ejection of Jet Superluminal Components, Precession and Gravito-Magnetic Distortion of Accretion Disks in Active Galactic Nuclei, Micro-Quasars, and T-Tauri Stars Dynamically Driven by Bardeen-Petterson Effect

Cuesta¹,

Sánchez²,

Pardo³

et al. 2011

TOAAJ

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Jet superluminal components are recurrently ejected from active galactic nuclei, micro-quasars, T-Tauri star, and several other astrophysical systems. The mechanism driving this powerful phenomenon is not properly settled down yet. In this article we suggest that ejection of ultrarelativistic components may be associated to the superposition of two actions: precession of the accretion disk induced by the Kerr black hole (KBH) spin, and fragmentation of tilted disk; this last being an astrophysical phenomenon driven by the general relativistic Bardeen-Petterson (B-P) effect. As fragmentation of the accretion disk takes place at the B-P transition radius, a suspended accretion state can develop amid this boundary and the innermost stable orbit around the KBH, which drives a turbulent flow along the inner accretion disk. The torus distortion caused by both hydrodynamic coupling of the inner face to the outer face, and Maxwell stresses from the magnetic field makes it to generate gravitational waves from its turbulent flow in the suspended accretion state. This magneto-centrifugal barrier also precludes incoming matter to penetrate the inner disk, creating ``en passant'' a sort of force-free region. The incoming material trapped in this sort of Lagrange internal point will forcibly precess becoming a source of continuous, frequency-modulated gravitational waves. Eventually, a condition of orbital resonance (beating) can activate between the precession pace and the frequency of the warps travelling along the torus due to its differential rotation. As this transition radius behaves like a sort of Lagrange internal point in a force-free magnetosphere, at resonance blobs can be expelled at ultrarelativistic velocities from the B-P radius in virtue of the power provided by either the vertical (to the disk) linear momentum carried by the surface acoustic wave on the torus warps, or the Aschenbach effect in a nearly maximal KBH, or some other orbital resonance like the well known resonance 3:1. The launching of superluminal components of jets should produce powerful gravitational wave (GW) bursts during its early acceleration phase, which can be catched on the fly by current GW observatories. Here we compute the characteristic amplitude and frequency of such signals and show that they are potentially detectable by the GW observatory LISA.

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Gravitational Waves From Ejection of Jet Superluminal Components and Precession of Accretion Disks Dynamically Driven by Bardeen-Petterson Effect

Cuesta

Sánchez

Pardo

et al. 2011

Int. J. Mod. Phys. Conf. Ser.

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Jet superluminal components are recurrently ejected from active galactic nuclei, microquasars, T-Tauri star, and several other astrophysical systems, including gamma-ray burst sources. The mechanism driving this powerful phenomenon is not properly settled down yet. In this article we suggest that ejection of ultrarelativistic components may be associated to the superposition of two actions: precession of the accretion disk induced by the Kerr black hole (KBH) spin, and fragmentation of the tilted disk; this last being an astrophysical phenomenon driven by the general relativistic Bardeen-Petterson (B-P) effect. As fragmentation of the accretion disk takes place at the B-P transition radius, the incoming material that get trapped in this sort of Lagrange internal point will forcibly precess becoming a source of continuous, frequency-modulated gravitational waves. At resonance blobs can be expelled at ultrarelativistic velocities from the B-P radius. The launching of superluminal components of jets should produce powerful gravitational wave (GW) bursts during its early acceleration phase, which can be catched on the fly by current GW observatories. Here we compute the characteristic amplitude and frequency of such signals and show that they are potentially detectable by the GW observatory LISA.

show abstract

Influence of the black hole rotation on accretion discs and jets in active galaxies: the case of NGC 1068

Cited by 3 publications

References 28 publications

Searching for warped disk AGN candidates

Searching for warped disk AGN candidates

Gravitational Waves Produced by Ejection of Jet Superluminal Components, Precession and Gravito-Magnetic Distortion of Accretion Disks in Active Galactic Nuclei, Micro-Quasars, and T-Tauri Stars Dynamically Driven by Bardeen-Petterson Effect

Gravitational Waves From Ejection of Jet Superluminal Components and Precession of Accretion Disks Dynamically Driven by Bardeen-Petterson Effect

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