Cosmic event horizons and the light-speed limit for relative radial motion

@article{Pssel2019CosmicEH,
  title={Cosmic event horizons and the light-speed limit for relative radial motion},
  author={Markus P�ssel},
  journal={arXiv: General Relativity and Quantum Cosmology},
  year={2019}
}
  • Markus P�ssel
  • Published 25 December 2019
  • Physics
  • arXiv: General Relativity and Quantum Cosmology
Cosmic event horizons separate spacetime into disjoint regions: those regions whose light signals can reach us, and more distant regions we cannot, even in principle, observe. For one type of cosmic horizon, associated with universes that keep expanding forever, there is a simple intuitive picture of where the cosmic horizon is located, in terms of the relative speed between a distant galaxy and our own approaching the speed of light: Where the light-speed limit is reached, light signals from… 

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References

SHOWING 1-10 OF 34 REFERENCES

Is space expanding in the Friedmann universe models

The interpretation of the expanding universe as an expansion of space has recently been challenged. From the geodesic equation in Friedmann universe models and the empty Milne model, we argue that a

Relativity: Special, General, and Cosmological

INTRODUCTION 1. From absolute space and time to influenceable spacetime: an overview PART I: SPECIAL RELATIVITY 2. Foundations of special relativity the Lorentz transformation 3. Relativistic

Doppler and cosmological interpretations of redshift

Relativity: Special, General and Cosmological (Oxford

  • 2001

Cosmology (Oxford: Oxford University

  • 2008

Spacetime curvature and recession velocities Astron. Nachr

  • 2007

Hubble spheres and particle horizons, Ap

  • J. 383 60–65
  • 1991

Lost Horizons

Politics chartered the development of the Humanities in South Africa. Under the apartheid system three separate traditions — English-speaking, Afrikaner and Homeland —co-existed, albeit uneasily, in

An Intuitive Approach to Cosmic Horizons

  • Adam Neat
  • Physics, Education
    The Physics Teacher
  • 2019
How far, in space, can we see? And can we see an object whose Hubble recessional velocity exceeds the speed of light? Maybe you’ve thought about these questions before, or perhaps you’ve seen them