Brando, GuilhermeFalciano, Felipe T.Linder, Eric V.Velten, Hermano E. S.2019-07-192019-07-192019-05-01Brando, G., Falciano, F.T, Linder, E.V., & Velten, H. (2019). Modified Gravity Away from a Lambda CDM Background. The 2nd international conference of the Energetic Cosmos Laboratory (ECL) at Nazarbayev University. Retrieved from https://arxiv.org/pdf/1904.12903.pdfhttp://nur.nu.edu.kz/handle/123456789/4014Energetic Cosmos Laboratory. ECL Publication, 2019Within the effective field theory approach to cosmic acceleration, the background expansion can be specified separately from the gravitational modifications. We explore the impact of modified gravity in a background different from a cosmological constant plus cold dark matter (ΛCDM) on the stability and cosmological observables, including covariance between gravity and expansion parameters. In No Slip Gravity the more general background allows more gravitational freedom, including both positive and negative Planck mass running. We examine the effects on cosmic structure growth, as well as showing that a viable positive integrated Sachs-Wolfe effect crosscorrelation easily arises from this modified gravity theory.enAttribution-NonCommercial-ShareAlike 3.0 United StatesThe 2nd international conference of the Energetic Cosmos Laboratory (ECL)Energetic Cosmos Laboratory (ECL)ECL19Article