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The European Physical Journal C

, 72:2130 | Cite as

Revisiting a model-independent dark energy reconstruction method

  • Ruth LazkozEmail author
  • Vincenzo Salzano
  • Irene Sendra
Regular Article - Theoretical Physics

Abstract

In this work we offer new insights into the model-independent dark energy reconstruction method developed by Daly and Djorgovski (Astrophys. J. 597:9, 2003; Astrophys. J. 612:652, 2004; Astrophys. J. 677:1, 2008). Our results, using updated SNeIa and GRBs, allow to highlight some of the intrinsic weaknesses of the method. Conclusions on the main dark energy features as drawn from this method are intimately related to the features of the samples themselves, particularly for GRBs, which are poor performers in this context and cannot be used for cosmological purposes, that is, the state of the art does not allow to regard them on the same quality basis as SNeIa. We find there is a considerable sensitivity to some parameters (window width, overlap, selection criteria) affecting the results. Then, we try to establish what the current redshift range is for which one can make solid predictions on dark energy evolution. Finally, we strengthen the former view that this model is modest in the sense it provides only a picture of the global trend and has to be managed very carefully. But, on the other hand, we believe it offers an interesting complement to other approaches, given that it works on minimal assumptions.

Keywords

Dark Energy High Redshift High Order Polynomial Distance Modulus Baryon Acoustic Oscillation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

We are thankful to Diego Pavón for pointing out to us the interest of the works by Daly and Djorgovski. Irene Sendra holds a PhD FPI fellowship contract from the Spanish Ministry of Economy and Competitiveness. All three authors are supported by the mentioned ministry through research projects FIS2010-15492 and Consolider EPI CSD2010-00064, by the Basque Government through the special research action KATEA and ETORKOSMO, and by the University of the Basque Country UPV/EHU under program UFI 11/55.

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Copyright information

© Springer-Verlag / Società Italiana di Fisica 2012

Authors and Affiliations

  1. 1.Fisika Teorikoaren eta Zientziaren Historia Saila, Zientzia eta Teknologia FakultateaEuskal Herriko UnibertsitateaBilbaoSpain

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