Non-parametric reconstruction of cosmological matter perturbations

被引:21
作者
Gonzalez, J. E. [1 ]
Alcaniz, J. S. [1 ]
Carvalho, J. C. [1 ]
机构
[1] Observ Nacl, Dept Astron, BR-20921400 Rio De Janeiro, RJ, Brazil
来源
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2016年 / 04期
关键词
dark energy theory; cosmological parameters from LSS; galaxy clustering; DARK ENERGY; CONSTRAINTS; CONSTANT; SUPERNOVA; UNIVERSE; GRAVITY; PARAMETER; LAMBDA; MODELS; BRANE;
D O I
10.1088/1475-7516/2016/04/016
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Perturbative quantities, such as the growth rate (f) and index (gamma), are powerful tools to distinguish different dark energy models or modified gravity theories even if they produce the same cosmic expansion history. In this work, without any assumption about the dynamics of the Universe, we apply a non-parametric method to current measurements of the expansion rate H(z) from cosmic chronometers and high-z quasar data and reconstruct the growth factor and rate of linearised density perturbations in the non-relativistic matter component. Assuming realistic values for the matter density parameter Omega(m0), as provided by current CMB experiments, we also reconstruct the evolution of the growth index-gamma with redshift. We show that the reconstruction of current H(z) data constrains the growth index to gamma = 0.56 +/- 0.12 (2 sigma) at z = 0.09, which is in full agreement with the prediction of the ACDM model and some of its extensions.
引用
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页数:13
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共 68 条
  • [1] Ade P.A.R., ARXIV150201589
  • [2] Dark energy and some alternatives: a brief overview
    Alcaniz, J. S.
    [J]. BRAZILIAN JOURNAL OF PHYSICS, 2006, 36 (4A) : 1109 - 1117
  • [3] Cosmic acceleration in brane cosmology
    Alcaniz, JS
    Pires, N
    [J]. PHYSICAL REVIEW D, 2004, 70 (04):
  • [4] A parametric model for dark energy
    Barboza, E. M., Jr.
    Alcaniz, J. S.
    [J]. PHYSICS LETTERS B, 2008, 666 (05) : 415 - 419
  • [5] Scalar-tensor gravity and quintessence
    Bartolo, N
    Pietroni, M
    [J]. PHYSICAL REVIEW D, 2000, 61 (02):
  • [6] Baryon acoustic oscillations in the Lyα forest of BOSS quasars
    Busca, N. G.
    Delubac, T.
    Rich, J.
    Bailey, S.
    Font-Ribera, A.
    Kirkby, D.
    Le Goff, J-M.
    Pieri, M. M.
    Slosar, A.
    Aubourg, E.
    Bautista, J. E.
    Bizyaev, D.
    Blomqvist, M.
    Bolton, A. S.
    Bovy, J.
    Brewington, H.
    Borde, A.
    Brinkmann, J.
    Carithers, B.
    Croft, R. A. C.
    Dawson, K. S.
    Ebelke, G.
    Eisenstein, D. J.
    Hamilton, J-C.
    Ho, S.
    Hogg, D. W.
    Honscheid, K.
    Lee, K-G.
    Lundgren, B.
    Malanushenko, E.
    Malanushenko, V.
    Margala, D.
    Maraston, C.
    Mehta, K.
    Miralda-Escude, J.
    Myers, A. D.
    Nichol, R. C.
    Noterdaeme, P.
    Olmstead, M. D.
    Oravetz, D.
    Palanque-Delabrouille, N.
    Pan, K.
    Paris, I.
    Percival, W. J.
    Petitjean, P.
    Roe, N. A.
    Rollinde, E.
    Ross, N. P.
    Rossi, G.
    Schlegel, D. J.
    [J]. ASTRONOMY & ASTROPHYSICS, 2013, 552
  • [7] Evidence for a lower value for H0 from cosmic chronometers data?
    Busti, Vinicius C.
    Clarkson, Chris
    Seikel, Marina
    [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2014, 441 (01) : L11 - L15
  • [8] Curvature quintessence
    Capozziello, S
    [J]. INTERNATIONAL JOURNAL OF MODERN PHYSICS D, 2002, 11 (04): : 483 - 491
  • [9] Supernova constraints on decaying vacuum cosmology
    Carneiro, S.
    Pigozzo, C.
    Borges, H. A.
    Alcaniz, J. S.
    [J]. PHYSICAL REVIEW D, 2006, 74 (02)
  • [10] Modified-source gravity and cosmological structure formation
    Carroll, Sean M.
    Sawicki, Ignacy
    Silvestri, Alessandra
    Trodden, Mark
    [J]. NEW JOURNAL OF PHYSICS, 2006, 8