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Operation of the Collaborative Composite Manufacturing CCM System
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Flip-flopping binary black holes.

Carlos O Lousto1, James Healy1

  • 1Center for Computational Relativity and Gravitation, School of Mathematical Sciences, Rochester Institute of Technology, 85 Lomb Memorial Drive, Rochester, New York 14623, USA.

Physical Review Letters
|April 25, 2015
PubMed
Summary
This summary is machine-generated.

Binary black hole simulations reveal long-term spin dynamics. One black hole

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Area of Science:

  • Astrophysics
  • General Relativity
  • Computational Physics

Background:

  • Binary black hole systems are key to understanding gravitational waves and black hole evolution.
  • The dynamics of black hole spins significantly influence binary evolution and merger outcomes.

Purpose of the Study:

  • To investigate the long-term spin dynamics of individual black holes in a binary system.
  • To analyze the flip-flop behavior of black hole spins during inspiral.

Main Methods:

  • Full numerical simulation of equal-mass binary spinning black holes from separation d≈25M to merger.
  • Integration of 3.5 post-Newtonian equations for spin evolution comparison.

Main Results:

  • Observed significant spin reorientation, from alignment to anti-alignment, over half a flip-flop cycle.
  • Numerical simulations confirm continuous spin flip-flopping throughout the binary's inspiral.
  • Derived analytic expressions for maximum flip-flop angle and frequency.

Conclusions:

  • Spin dynamics play a crucial role in binary black hole evolution.
  • These dynamics can impact spin growth in accreting binaries.
  • Findings have implications for observational consequences in galactic and supermassive binary black holes.