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Evolution of density perturbations in decaying vacuum cosmology

H. A. Borges1, S. Carneiro1,2, J. C. Fabris3,*, and C. Pigozzo1

  • 1Instituto de Física, Universidade Federal da Bahia, Salvador, BA, Brazil
  • 2International Centre for Theoretical Physics, Trieste, Italy
  • 3Institut d’Astrophysique de Paris, Paris, France

  • *Permanent address: Departamento de Física, Universidade Federal do Espírito Santo, Vitória, ES, Brazil.
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Phys. Rev. D 77, 043513 – Published 14 February, 2008

DOI: https://doi.org/10.1103/PhysRevD.77.043513

Abstract

We study cosmological perturbations in the context of an interacting dark energy model, in which the cosmological term decays linearly with the Hubble parameter, with concomitant matter production. A previous joint analysis of the redshift-distance relation for type Ia supernovas, barionic acoustic oscillations, and the position of the first peak in the anisotropy spectrum of the cosmic microwave background has led to acceptable values for the cosmological parameters. Here we present our analysis of small perturbations, under the assumption that the cosmological term, and therefore the matter production, are strictly homogeneous. Such a homogeneous production tends to dilute the matter contrast, leading to a late-time suppression in the power spectrum. Nevertheless, an excellent agreement with the observational data can be achieved by using a higher matter density as compared to the concordance value previously obtained. This may indicate that our hypothesis of homogeneous matter production must be relaxed by allowing perturbations in the interacting cosmological term.

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See Also

Evolution of density perturbations in decaying vacuum cosmology: The case of nonzero perturbations in the cosmological term

H. A. Borges, S. Carneiro, and J. C. Fabris
Phys. Rev. D 78, 123522 (2008)

Article Text

References (28)

  1. V. Sahni and A. A. Starobinsky, Int. J. Mod. Phys. D 9, 373 (2000); T. Padmanabhan, Phys. Rep. 380, 235 (2003); P. J. E. Peebles and B. Ratra, Rev. Mod. Phys. 75, 559 (2003).
  2. M. Ozer and O. Taha, Phys. Lett. B 171, 363 (1986); Nucl. Phys. B287, 776 (1987); O. Bertolami, Nuovo Cimento 93, 36 (1986); K. Freese et al., Nucl. Phys. B287, 797 (1987).
  3. R. Schützhold, Phys. Rev. Lett. 89, 081302 (2002).
  4. I. G. Dymnikova and M. Yu. Khlopov, Mod. Phys. Lett. A 15, 2305 (2000); R. Horvat, Phys. Rev. D 70, 087301 (2004); I. Shapiro, J. Solà, and H. Stefancic, J. Cosmol. Astropart. Phys. 01 (2005) 012; F. Bauer, Classical Quantum Gravity 22, 3533 (2005); J. S. Alcaniz and J. A. S. Lima, Phys. Rev. D 72, 063516 (2005); R. Aldrovandi, J. P. Beltrán, and J. G. Pereira, Gravitation Cosmol. 11, 277 (2005); J. Grande et al., J. Cosmol. Astropart. Phys. 12 (2007) 007.
  5. J. C. Fabris, I. Shapiro, and J. Sola, J. Cosmol. Astropart. Phys. 02 (2007) 016.
  6. J. D. Barrow and T. Clifton, Phys. Rev. D 73, 103520 (2006).
  7. W. Zimdahl and D. Pavón, Gen. Relativ. Gravit. 35, 413 (2003); B. Wang, Y. Gong, and E. Abdalla, Phys. Lett. B 624, 141 (2005); B. Wang, C. Lin, and E. Abdalla, 637, 357 (2006); B. Wang et al., Nucl. Phys. B778, 69 (2007); C. Feng et al., J. Cosmol. Astropart. Phys. 09 (2007) 005; E. Abdalla et al., arXiv:0710.1198.
  8. P. A. M. Dirac, Nature (London) 139, 323 (1937).
  9. R. Opher and A. Pellison, Phys. Rev. D 70, 063529 (2004).
  10. H. A. Borges and S. Carneiro, Gen. Relativ. Gravit. 37, 1385 (2005).
  11. S. Carneiro, H. A. Borges, C. Pigozzo, and J. S. Alcaniz, Phys. Rev. D 74, 023532 (2006).
  12. S. Carneiro, Int. J. Mod. Phys. D 15, 2241 (2006); J. Phys. A 40, 6841 (2007).
  13. S. Carneiro, Int. J. Mod. Phys. D 12, 1669 (2003).
  14. R. C. Arcuri and I. Waga, Phys. Rev. D 50, 2928 (1994).
  15. J. C. Fabris, S. V. B. Goncalves, and P. E. de Souza, Gen. Relativ. Gravit. 34, 53 (2002); M. C. Bento, O. Bertolami, and A. A. Sen, Phys. Rev. D 66, 043507 (2002); A. Dev, D. Jain, and J. S. Alcaniz, 67, 023515 (2003); M. Makler, S. Q. de Oliveira, and I. Waga, Phys. Lett. B 555, 1 (2003).
  16. S. Silva e Costa and M. Makler, arXiv:astro-ph/0702418.
  17. H. Sandvik et al., Phys. Rev. D 69, 123524 (2004).
  18. P. Astier et al., Astron. Astrophys. 447, 31 (2006).
  19. S. Carneiro, M. A. Dantas, C. Pigozzo, and J. S. Alcaniz, arXiv:0711.2686.
  20. B. M. S. Hansen et al., Astrophys. J. 574, L155 (2002).
  21. P. de Bernardis et al., Nature (London) 404, 955 (2000); S. Hanany et al., Astrophys. J. Lett. 545, L5 (2000); S. Padin et al., ibid. 549, L1 (2001); D. N. Spergel et al., Astrophys. J. Suppl. Ser. 148, 175 (2003).
  22. O. Lahav and A. R. Liddle, arXiv:astro-ph/0601168.
  23. S. Dodelson, Modern Cosmology (Academic Press, London, 2003).
  24. J. Martin, A. Riazuelo, and M. Sakellariadou, Phys. Rev. D 61, 083518 (2000); J. M. Bardeen, J. R. Bond, N. Kaiser, and A. S. Szalay, Astrophys. J. 304, 15 (1986).
  25. S. Weinberg, Gravitation and Cosmology (Wiley, New York, 1972).
  26. R. Colistete, Jr., J. C. Fabris, J. Tossa, and W. Zimdahl, Phys. Rev. D 76, 103516 (2007).
  27. S. Cole et al., Mon. Not. R. Astron. Soc. 362, 505 (2005).
  28. R. G. Calberg et al., Astrophys. J. 462, 32 (1996); M. S. Turner, 576, L101 (2002); H. A. Feldman et al., 596, L131 (2003).

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Phys. Rev. D 77, 043513– Published 14 February, 2008
  • Received 21 November 2007

© 2008 American Physical Society

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