An emulator trained on modified-gravity simulations enables MCMC forecasts showing that LSST plus CMB lensing constrains the lensing combination Sigma(z)=mu(1+eta)/2 much better than mu or eta alone, especially at z>2.
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astro-ph.CO 2years
2026 2representative citing papers
Using CMB, SN, BAO and shear data, the work shows dynamical dark energy in MG models correlates with deviations from GR below z=2 at >95% CL, a link that holds for varying sound speed but vanishes for a cosmological constant.
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Cosmological gravity on all scales V: MCMC forecasts combining large scale structure and CMB lensing for binned phenomenological modified gravity
An emulator trained on modified-gravity simulations enables MCMC forecasts showing that LSST plus CMB lensing constrains the lensing combination Sigma(z)=mu(1+eta)/2 much better than mu or eta alone, especially at z>2.
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The sound of dynamical dark energy and modified gravity
Using CMB, SN, BAO and shear data, the work shows dynamical dark energy in MG models correlates with deviations from GR below z=2 at >95% CL, a link that holds for varying sound speed but vanishes for a cosmological constant.