Astrophysical constraints on scalar field models

@article{Bertolami2004AstrophysicalCO,
  title={Astrophysical constraints on scalar field models},
  author={Orfeu Bertolami and Jorge P{\'a}ramos},
  journal={Physical Review D},
  year={2004},
  volume={71},
  pages={023521}
}
We use stellar structure dynamics arguments to extract bounds on the relevant parameters of two scalar field models: the putative scalar field mediator of a fifth force with a Yukawa potential and the new variable mass particle models. We also analyze the impact of a constant solar inbound acceleration, such as the one reported by the Pioneer anomaly, on stellar astrophysics. We consider the polytropic gas model to estimate the effect of these models on the hydrostatic equilibrium equation and… 

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References

SHOWING 1-10 OF 30 REFERENCES

Textbook of Astronomy and Astrophysics with Elements of Cosmology

Preface / General Astronomy / Stellar Atmospheres / Stellar Structure / Stellar Energy Sources and Nucleosynthesis / White Dwarf and Neutron Stars / Galactic Structure and Elements of Cosmology /

Phys

  • Rev. D65
  • 2002

The Search for Non-Newtonian Gravity

1 Introduction.- 2 Phenomenological Description of Non-Newtonian Gravity.- 3 Searches for Composition-Independent Effects.- 4 Searches for Composition-Dependent Effects.- 5 Gravitational Properties

Phys. Lett

  • Phys. Lett
  • 2001

Phys. Rev

  • Phys. Rev
  • 2002

Phys

  • Lett. B511 (2001) 265; M.C. Bento, O. Bertolami, A.A. Sen, Phys. Rev. D66
  • 2002

Fortschr. Physik Phys. Rev. Ap. J. Lett

  • Fortschr. Physik Phys. Rev. Ap. J. Lett
  • 1986

Phys. Rev

  • Phys. Rev
  • 2004

Class

  • Quantum Gravity 21
  • 2004

Theoretical Astrophysics: Stars and Stellar Systems

  • Theoretical Astrophysics: Stars and Stellar Systems
  • 2001