Can Cosmic Strings Align Black Holes?

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SUMMARY

The discussion centers on the role of cosmic strings in aligning black holes, highlighting the lack of comprehensive simulations that track black hole spin. Current cosmological hydrodynamical simulations have limitations, particularly in their resolution regarding accretion processes, necessitating the use of semi-analytic prescriptions. Despite predictions of intrinsic alignments in galaxies being observed, the absence of detailed simulations for black hole interactions remains a significant gap in cosmological research.

PREREQUISITES
  • Understanding of cosmic strings and their theoretical implications in cosmology
  • Familiarity with black hole physics and spin dynamics
  • Knowledge of cosmological hydrodynamical simulations and their limitations
  • Experience with semi-analytic modeling techniques in astrophysics
NEXT STEPS
  • Research advanced techniques in cosmological hydrodynamical simulations
  • Explore the impact of cosmic strings on galaxy formation and evolution
  • Investigate methods for tracking black hole spin in simulations
  • Learn about intrinsic alignments and their observational evidence in astrophysics
USEFUL FOR

Astronomers, astrophysicists, and researchers interested in the dynamics of black holes and cosmic structures, particularly those focusing on simulation techniques and theoretical models in cosmology.

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This is really facsinating to think that there might have been such large-scale uniformity in the early universe.
 
Most of the problem of comparing this result to theory is not that models have failed to predict it but that nobody (as far as I know) simulates this sort of stuff. I don't know of any large cosmological simulation which actually tracks black hole spin. It's only recently that cosmological hydrodynamical simulations have come along, even still accretion is below the resolution of these simulations so semi-analytic prescriptions are used. While there is clear prediction in simulations that we should see intrinsic alignments in galaxies (which is observed) simulations just don't include this level of detail.
 

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