Relativistic Dynamics and Mass Exchange in Binary Black Hole Mini-disks

Bowen, Dennis; Campanelli, Manuela; Krolik, Julian H.; Mewes, Vassilios; Noble, Scott C.

doi:10.3847/1538-4357/aa63f3

Cited by 82 publications

(120 citation statements)

References 83 publications

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“…They find that individual "mini-disks" form around each black hole. Bowen et al [361] have studied these mini-disks in their post-Newtonian spacetime, inserting disks around each hole and evolving them to an overall steady state. The discovery of these "mini-disks" illustrates the possibility of further surprises as future simulations incorporate long evolutions as well as radiation transport with associated thermal effects.…”

Section: A Black Hole-black Hole Binaries With Accretionmentioning

confidence: 99%

Numerical relativity of compact binaries in the 21st century

Duez

Zlochower²

2018

Rep. Prog. Phys.

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We review the dramatic progress in the simulations of compact objects and compact-object binaries that has taken place in the first two decades of the twenty-first century. This includes simulations of the inspirals and violent mergers of binaries containing black holes and neutron stars, as well as simulations of black-hole formation through failed supernovae and high-mass neutron star-neutron star mergers. Modeling such events requires numerical integration of the field equations of general relativity in three spatial dimensions, coupled, in the case of neutron-star containing binaries, with increasingly sophisticated treatment of fluids, electromagnetic fields, and neutrino radiation. However, it was not until 2005 that accurate long-term evolutions of binaries containing black holes were even possible (Pretorius 2005 Phys. Rev. Lett. 95 121101, Campanelli et al 2006 Phys. Rev. Lett. 96 111101, Baker et al 2006 Phys. Rev. Lett. 96 111102). Since then, there has been an explosion of new results and insights into the physics of strongly-gravitating system. Particular emphasis has been placed on understanding the gravitational wave and electromagnetic signatures from these extreme events. And with the recent dramatic discoveries of gravitational waves from merging black holes by the Laser Interferometric Gravitational Wave Observatory and Virgo, and the subsequent discovery of both electromagnetic and gravitational wave signals from a merging neutron star-neutron star binary, numerical relativity became an indispensable tool for the new field of multimessenger astronomy.

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Section: A Black Hole-black Hole Binaries With Accretionmentioning

confidence: 99%

Numerical relativity of compact binaries in the 21st century

Duez

Zlochower²

2018

Rep. Prog. Phys.

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“…From giant planet formation spurring streams across disk gaps (Lubow & D'Angelo 2006) to accretion onto binary black holes (Bowen et al 2017), the same physical processes are at play. Interferometry and adaptive optics techniques are beginning to spatially resolve such structures in pre-MS systems (Beck et al 2012;Casassus et al 2013;Yang et al 2017), but they are unable to describe their temporal characteristics.…”

Section: Introductionmentioning

confidence: 99%

Pulsed Accretion in the T Tauri Binary TWA 3A

Tofflemire

Herczeg

Akeson

et al. 2017

ApJL

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TWA 3A is the most recent addition to a small group of young binary systems that both actively accrete from a circumbinary disk and have spectroscopic orbital solutions. As such, it provides a unique opportunity to test binary accretion theory in a well-constrained setting. To examine TWA 3A's time-variable accretion behavior, we have conducted a two-year, optical photometric monitoring campaign, obtaining dense orbital phase coverage (∼20 observations per orbit) for ∼15 orbital periods. From U-band measurements we derive the time-dependent binary mass accretion rate, finding bursts of accretion near each periastron passage. On average, these enhanced accretion events evolve over orbital phases 0.85 to 1.05, reaching their peak at periastron. The specific accretion rate increases above the quiescent value by a factor of ∼4 on average but the peak can be as high as an order of magnitude in a given orbit. The phase dependence and amplitude of TWA 3A accretion is in good agreement with numerical simulations of binary accretion with similar orbital parameters. In these simulations, periastron accretion bursts are fueled by periodic streams of material from the circumbinary disk that are driven by the binary orbit. We find that TWA 3A's average accretion behavior is remarkably similar to DQ Tau, another T Tauri binary with similar orbital parameters, but with significantly less variability from orbit to orbit. This is only the second clear case of orbital-phase-dependent accretion in a T Tauri binary.

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“…In particular, the multipolar post-Newtonian formalism used to build the near-and far-zone metrics ensures that they are matched by construction [21]. Such spacetime was implemented and used to investigate the physics of accretions disks in the presence of BHBs [25][26][27][28]. a.s.c.…”

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confidence: 99%

Physics of black hole binaries: Geodesics, relaxation modes, and energy extraction

et al. 2019

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Black holes are the simplest macroscopic objects, and provide unique tests of General Relativity. They have been compared to the Hydrogen atom in quantum mechanics. Here, we establish a few facts about the simplest systems bound by gravity: black hole binaries. We provide strong evidence for the existence of "global" photosurfaces surrounding the binary, and of binary quasinormal modes leading to exponential decay of massless fields when the binary spacetime is slightly perturbed. These two properties go hand in hand, as they did for isolated black holes. The binary quasinormal modes have high quality factor and may be prone to resonant excitations. Finally, we show that energy extraction from binaries is generic and we find evidence of a new mechanism -akin to the Fermi acceleration process -whereby the binary transfers energy to its surroundings in a cascading process. The mechanism is conjectured to work when the individual components spin, or are made of compact stars.

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Relativistic Dynamics and Mass Exchange in Binary Black Hole Mini-disks

Cited by 82 publications

References 83 publications

Numerical relativity of compact binaries in the 21st century

Numerical relativity of compact binaries in the 21st century

Pulsed Accretion in the T Tauri Binary TWA 3A

Physics of black hole binaries: Geodesics, relaxation modes, and energy extraction

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