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Browsing by Author "D'Amico, Guido"

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Browsing by Author "D'Amico, Guido"

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  • D'Amico, Guido; Bartolo, Nicola; Matarrese, Sabino; Riotto, Antonio (2008-01-17)
    In this paper we present a complete computation of the Cosmic Microwave Background (CMB) anisotropies up to third order from gravitational perturbations accounting for scalar, vector and tensor perturbations. We then specify ...
  • D'Amico, Guido (SISSA, 2010-07-28)
    In the last twenty years, cosmology has become a precision science. Since the COBE era, a wealth of data, along with advances in theoretical interpretation and numerical analysis, provided us with a convincing model of the ...
  • Creminelli, Paolo; D'Amico, Guido; Norena, Jorge; Vernizzi, Filippo (IOP Publishing, 2009-02-13)
    We study generic single-field dark energy models, by a parametrization of the most general theory of their perturbations around a given background, including higher derivative terms. In appropriate limits this approach ...
  • D'Amico, Guido; Musso, Marcello; Norena, Jorge; Paranjape, Aseem (American Physical Society, 2011-01-25)
    Primordial non-Gaussianity (NG) affects the large scale structure (LSS) of the universe by leaving an imprint on the distribution of matter at late times. Much attention has been focused on using the distribution of collapsed ...
  • Creminelli, Paolo; D'Amico, Guido; Musso, Marcello; Norena, Jorge; Trincherini, Enrico (IOP Publishing, 2011-02-04)
    We study the consequences of imposing an approximate Galilean symmetry on the Effective Theory of Inflation, the theory of small perturbations around the inflationary background. This approach allows us to study the effect ...
  • D'Amico, Guido; Musso, Marcello; Norena, Jorge; Paranjape, Aseem (IOP Publishing, 2011-02-01)
    The abundance of collapsed objects in the universe, or halo mass function, is an important theoretical tool in studying the effects of primordially generated non-Gaussianities on the large scale structure. The non-Gaussian ...
  • Boubekeur, Lotfi; Creminelli, Paolo; D'Amico, Guido; Norena, Jorge; Vernizzi, Filippo (IOP Publishing, 2009-08-25)
    We calculate the Cosmic Microwave Background anisotropy bispectrum on large angular scales in the absence of primordial non-Gaussianities, assuming exact matter dominance and extending at second order the classic Sachs-Wolfe ...
  • Creminelli, Paolo; D'Amico, Guido; Norena, Jorge; Senatore, Leonardo; Vernizzi, Filippo (IOP Publishing, 2010-03-22)
    We study the spherical collapse model in the presence of quintessence with negligible speed of sound. This case is particularly motivated for w<-1 as it is required by stability. As pressure gradients are negligible, ...