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Running cosmological constant with observational tests

2016
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Physics Letters B
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We investigate the running cosmological constant model with dark energy linearly proportional to the Hubble parameter, $\Lambda = \sigma H + \Lambda_0$, in which the $\Lambda$CDM limit is recovered by taking $\sigma=0$. We derive the linear perturbation equations of gravity under the Friedmann-Lema\"itre-Robertson-Walker cosmology, and show the power spectra of the CMB temperature and matter density distribution. By using the Markov chain Monte Carlo method, we fit the model to the current

doi:10.1016/j.physletb.2016.07.026
fatcat:5qvsr3nej5dajgvr6s5r54e3rm