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Browsing by Author "4d663da3-f959-4853-85b6-48bde7eaa1d2"

Browsing by Author "4d663da3-f959-4853-85b6-48bde7eaa1d2"

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  • Cosmic Curvature Tested Directly from Observations 
    Denissenya, Mikhail; Linder, Eric V.; Shafieloo, Arman (NURIS; Energetic Cosmos Laboratory, 2018-02-13)
    Cosmic spatial curvature is a fundamental geometric quantity of the Universe. We investigate a model independent, geometric approach to measure spatial curvature directly from observations,without any derivatives of data. ...
  • Debiasing Cosmic Gravitational Wave Sirens [Article] 
    Keeley, Ryan E.; Shafieloo, Arman; L'Huillier, Benjamin; Linder, Eric V. (NURIS; Energetic Cosmos Laboratory, 2019-05-27)
    Accurate estimation of the Hubble constant, and other cosmological parameters, from distances measured by cosmic gravitational wave sirens requires sufficient allowance for the dark energy evolution. We demonstrate how ...
  • Model independent expansion history from supernovae: Cosmology versus systematics 
    L'Huillier, Benjamin; Shafieloo, Arman; Linder, Eric V.; Kim, Alex G. (NURIS; Energetic Cosmos Laboratory, 2019-03-05)
    We examine the Pantheon supernovae distance data compilation in a model independent analysis to test the validity of cosmic history reconstructions beyond the concordance ΛCDM cosmology. Strong deviations are allowed by ...
  • Probing features in inflaton potential and reionization history with future CMB space observations 
    Hazra, Dhiraj Kumar; Paoletti, Daniela; Ballardini, Mario; Finelli, Fabio; Shafieloo, Arman; Smoot, George F; Starobinsky, Alexei A. (NURIS; Energetic Cosmos Laboratory, 2018-03-04)
    We consider the prospects of probing features in the primordial power spectrum with future Cosmic Microwave Background (CMB) polarization measurements. In the scope of the inflationary scenario, such features in the spectrum ...
  • Will Gravitational Wave Sirens Determine the Hubble Constant? [Article] 
    Shafieloo, Arman; Keeley, Ryan E.; Linder, Eric V. (NURIS; Energetic Cosmos Laboratory, 2018-12-19)
    Lack of knowledge about the background expansion history of the Universe from independent observations makes it problematic to obtain a precise and accurate estimation of the Hubble constant H0 from gravitational wave ...