Null tests of the cosmological constant using supernovae

Understand

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.
• In addition to using generic observational tests, one can also design tests that target the specific properties of the cosmological constant.
• These null tests do not rely on parametrisations of observables, but focus on quantities that are constant only if dark energy is a cosmological constant.