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WMAP constraints on low redshift evolution of dark energy

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arxiv astro-ph/0404378 v2 pith:E7P32M4U submitted 2004-04-20 astro-ph gr-qchep-th

classification astro-phgr-qchep-th
keywords constraintsdarkenergyconstantcosmologicalobservationswmapalternative
verification ladder T0 review T1 audit T2 compute T3 formal

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abstract

The conceptual difficulties associated with a cosmological constant have led to the investigation of alternative models in which the equation of state parameter, $w=p/\rho$, of the dark energy evolves with time. We show that combining the supernova type Ia observations {\it with the constraints from WMAP observations} restricts large variation of $\rho(z)$ at low redshifts. The combination of these two observational constraints is stronger than either one. The results are completely consistent with the cosmological constant as the source of dark energy.

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Cited by 5 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Physics-guided discovery of dynamical dark-energy equations of state through iterative AI reasoning

    astro-ph.CO 2026-06 unverdicted novelty 7.0 of 10

    An iterative AI reasoning process proposes new dynamical dark energy equations of state that are competitive with traditional forms on supernova, BAO, and Planck data.

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    astro-ph.CO 2026-06 unverdicted novelty 7.0 of 10

    Bayesian reconstruction and exhaustive symbolic regression on CMB, BAO, and supernova data yield the one-parameter dark energy parametrization w(a) = w0 / sqrt(a) that fits observations comparably to CPL and better th...

  3. Evolution of matter perturbations in the context of cosmic slowing down

    gr-qc 2026-08 conditional novelty 4.0 of 10

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  4. No preference for generalized emergent dark energy from current cosmological data

    astro-ph.CO 2026-07 conditional novelty 4.0 of 10

    GEDE dark energy is observationally indistinguishable from ΛCDM once supernova data are included, with no phantom crossing and no resolution of the H0 and S8 tensions.

  5. Constraints on unimodular diffusion models with latest observables

    physics.gen-ph 2026-07 conditional novelty 4.0 of 10

    Unimodular diffusion models with latest DESI/DESY5/Planck data show intermediate-time transitions and only mild, non-decisive preference over ΛCDM without resolving H0.

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