SISSA Digital Library

Browsing by Author "D'Amico, Guido"

DSpace/Manakin Repository

Browsing by Author "D'Amico, Guido"

Sort by: Order: Results:

  • CMB temperature anisotropies from third-order gravitational perturbations
    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 ...
  • Dark Energy and Non-Gaussianity Through the Large Scale Structure
    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 ...
  • The effective theory of quintessence: the w<-1 side unveiled
    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 ...
  • Excursion sets and non-Gaussian void statistics
    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 ...
  • Galilean symmetry in the effective theory of inflation: new shapes of non-Gaussianity
    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 ...
  • An improved calculation of the non-Gaussian halo mass function
    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 ...
  • Sachs-Wolfe at second order: the CMB bispectrum on large angular scales
    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 ...
  • Spherical collapse in quintessence models with zero speed of sound
    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, ...