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- W1569663988 abstract "We note that the standard LCDM cosmological model continues to face fundamental problems. First, the model continues to depend wholly on two pieces of undiscovered physics, namely dark energy and cold dark matter. Then, the implied dark energy density is so small that it is unstable to quantum correction and its size is fine-tuned to the almost impossible level of one part in ~10^102; it is also difficult to explain the coincidence between the dark energy, dark matter and baryon densities at the present day. Moreover, any model with a positive cosmological constant also creates fundamental difficulties for superstring theories of quantum gravity. We also review the significant number of astrophysical observations which are now in contradiction with the LCDM model. On the grounds that the SNIa Hubble diagram is prone to evolutionary corrections and also that the CMB power spectrum may be contaminated by the effects of foreground ionised gas, we argue that the existence of such systematics could still allow more satisfactory, alternative, models to appear. We suggest that if H_0<50kms^-1Mpc^-1 then a simpler, inflationary model with Omega_baryon=1 might still be allowed with no need for dark energy or cold dark matter." @default.
- W1569663988 created "2016-06-24" @default.
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- W1569663988 date "2004-01-01" @default.
- W1569663988 modified "2023-09-26" @default.
- W1569663988 title "Problems with the current cosmological paradigm" @default.
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