DE2 - Inhomogeneous Cosmology |
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Speaker |
Romano, Antonio Enea |
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Coauthors |
Romano, Antonio Enea; Starobinsky, Alexei; Sasaki, Misao |
| Talk Title |
Non pertubative effects of primordial curvature pertubations on cosmological observables |
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Abstract |
We study effects on the luminosity distance of a local inhomogeneity seeded by primordial curvature perturbations of the type predicted by the inflationary scenario and constrained by the cosmic microwave background radiation. We find that a local underdensity originated from a one, two or three standard deviations peaks of the primordial curvature perturbations field can induce corrections to the value of a cosmological constant of the order of 0.6 respectively. These effects cannot be neglected in the precision cosmology era in which we are entering. Our results can be considered an upper bound for the effect of the monopole component of the local non linear structure which can arise from primordial curvature perturbations and requires a fully non perturbative relativistic treatment. Finally we show how the effects of such a local inhomogeneity could solve the tension between the local estimation and the Planck mission estimation of the Hubble parameter. |
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