3 papers
astro-ph.CO2020
Hints for possible low redshift oscillation around the best fit CDM model in the expansion history of the Universe
L. Kazantzidis, H. Koo, S. Nesseris +2
We search for possible deviations from the expectations of the concordance CDM model in the expansion history of the Universe by analysing the Pantheon Type Ia Supernovae (SnIa)…
astro-ph.CO2020
Model selection and parameter estimation using the iterative smoothing method
Hanwool Koo, Arman Shafieloo, Ryan E. Keeley +1
We compute the distribution of likelihoods from the non-parametric iterative smoothing method over a set of mock Pantheon-like type Ia supernova datasets. We use this likelihood di…
astro-ph.CO2020
Model-independent constraints on Type Ia supernova light-curve hyper-parameters and reconstructions of the expansion history of the Universe
Hanwool Koo, Arman Shafieloo, Ryan E. Keeley +1
We reconstruct the expansion history of the Universe using type Ia supernovae (SN Ia) in a manner independent of any cosmological model assumptions. To do so, we implement a non-pa…