829 citations · 2.8k across the 42 of their papers we have counts for
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Cosmological parameter constraints for Horndeski scalar-tensor gravity
Johannes Noller, Andrina Nicola
We present new cosmological parameter constraints for general Horndeski scalar-tensor theories, using CMB, redshift space distortion, matter power spectrum and BAO measurements fro…
Radiative stability and observational constraints on dark energy and modified gravity
Johannes Noller, Andrina Nicola
We investigate the radiative stability of Horndeski scalar-tensor theories with luminally propagating gravitational waves (as extensively discussed in the wake of GW170817) and sho…
Inflation in a scale invariant universe
Pedro G. Ferreira, Christopher T. Hill, Johannes Noller +1
A scale-invariant universe can have a period of accelerated expansion at early times: inflation. We use a frame-invariant approach to calculate inflationary observables in a scale…