Browsing by Author "Sapone, Doménico"

Now showing items 1-4 of 4

    • Accuracy of the growth index in the presence of dark energy perturbations 
      Nesseris, Savvas; Sapone, Doménico (Amer Physical Soc, 2015)
      We present the analytical solutions for the evolution of matter density perturbations, for a model with a constant dark energy equation of state w but when the effects of the dark energy (DE) perturbations are properly ...
    • Combined constraints on deviations of dark energy from an ideal fluid from Euclid and Planck 
      Majerotto, Elisabetta; Sapone, Doménico; Schäfer, Björn Malte (Oxford University Press, 2016)
      Cosmological fluids are commonly assumed to be distributed in a spatially homogeneous way, while their internal properties are described by a perfect fluid. As such, they influence the Hubble expansion through their ...
    • Reconstruction of the null-test for the matter density perturbations 
      Nesseris, Savvas; Sapone, Doménico; García Bellido, Juan (American Physical Society, 2015)
      We systematically study the null-test for the growth rate data first presented in [S. Nesseris and D. Sapone, arXiv:1409.3697.] and we reconstruct it using various combinations of data sets, such as the fσ8 and HðzÞ or ...
    • Validating the Fisher approach for stage IV spectroscopic surveys 
      Yahia Cherif, S.; Blanchard, A.; Camera, S.; Casas, S.; Ilic, S.; Markovic, K.; Pourtsidou, A.; Sakr, Z.; Sapone, Doménico; Tutusaus, I. (EDP Sciences S A, 2021)
      In recent years, forecasting activities have become an important tool in designing and optimising large-scale structure surveys. To predict the performance of such surveys, the Fisher matrix formalism is frequently used ...