Cosmological Parameter Extraction and Biases from Type Ia Supernova Magnitude Evolution

  title={Cosmological Parameter Extraction and Biases from Type Ia Supernova Magnitude Evolution},
  author={Sebastian Linden and J. M. Virey and Andr'e Tilquin},
  journal={Astronomy and Astrophysics},
We study different one-parametric models of type Ia Supernova magnitude evolution on cosmic time scales. Constraints on cosmological and Supernova evolution parameters are obtained by combined fits on the actual data coming from Supernovae, the cosmic microwave background, and baryonic acoustic oscillations. We find that data prefer a magnitude evolution such that high-redshift Supernova are brighter than would be expected in a standard cosmos with a dark energy component. Data however are… 

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