Browsing Research Articles (Physics) by Author "Seikel, Marina"

Now showing items 1-3 of 3

    • Constraints on anisotropic cosmic expansion from supernovae 

      Kalus, Benedict; Schwarz, Dominik J.; Seikel, Marina; Wiegand, Alexander (Edp Sciences, 2013)
      AIMS. We test the isotropy of the expansion of the Universe by estimating the hemispherical anisotropy of supernova type Ia (SN Ia) Hubble diagrams at low redshifts (z < 0.2). METHODS. We compare the best fit Hubble ...

    • Null tests of the cosmological constant using supernovae 

      Yahya, Sahba; Seikel, Marina; Clarkson, Chris; Maartens, Roy; Smith, Mathew (American Physical Society, 2014)
      The standard concordance model of the Universe is based on the cosmological constant as the driver of accelerating expansion. This concordance model is being subjected to a growing range of inter-locking observations. ...

    • Reconstruction of dark energy and expansion dynamics using Gaussian processes 

      Seikel, Marina; Clarkson, Chris (IOP Publishing, 2012)
      An important issue in cosmology is reconstructing the effective dark energy equation of state directly from observations. With few physically motivated models, future dark energy studies cannot only be based on constraining ...