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Setting Limits on Supersymmetry Using Simplified Models
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Published on: November 15, 2013

Surface singularities in Eddington-inspired Born-Infeld gravity.

Paolo Pani1, Thomas P Sotiriou

  • 1CENTRA, Departamento de Física, Instituto Superior Técnico, Universidade Técnica de Lisboa-UTL, Avenida Rovisco Pais 1, 1049 Lisboa, Portugal.

Physical Review Letters
|February 2, 2013
PubMed
Summary
This summary is machine-generated.

Eddington-inspired Born-Infeld gravity, an alternative to general relativity, may not resolve spacetime singularities. This theory shares pathologies with Palatini f(R) gravity, raising concerns about its viability in astrophysics.

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Area of Science:

  • Theoretical Physics
  • Gravitational Physics
  • Cosmology

Background:

  • General relativity predicts spacetime singularities, posing challenges for theoretical physics.
  • Eddington-inspired Born-Infeld gravity offers a potential singularity resolution.
  • This theory aligns with current observational data.

Purpose of the Study:

  • To investigate the theoretical viability of Eddington-inspired Born-Infeld gravity.
  • To compare its properties with established gravitational theories.
  • To identify potential limitations and pathologies.

Main Methods:

  • Comparative analysis of Eddington-inspired Born-Infeld gravity and Palatini f(R) gravity.
  • Examination of the theory's behavior within polytropic stars.
  • Assessment of the Newtonian limit.

Main Results:

  • Eddington-inspired Born-Infeld gravity exhibits similarities to Palatini f(R) gravity.
  • The theory presents curvature singularities at stellar surfaces.
  • An unacceptable Newtonian limit was identified.

Conclusions:

  • The identified pathologies cast significant doubt on the viability of Eddington-inspired Born-Infeld gravity.
  • The theory's proposed singularity resolution may be compromised.
  • Further theoretical and observational scrutiny is warranted.