Pith. sign in

REVIEW 4 cited by

Cosmological bounds on the equation of state of dark matter

Not yet reviewed by Pith; the record is open.

Re-run · record.json Download PDF Read on arXiv ↗

This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.

SPECIMEN: schema-true, not a live event

T0 review · schema-true

One-sentence machine reading of the paper's core claim.

pith:XXXXXXXX · record.json · timestamp

arxiv astro-ph/0410621 v2 pith:4HMGQYWB submitted 2004-10-26 astro-ph

Christian M. Mueller This is my paper
classification astro-ph
keywords darkmatterstateequationboundsaccountadiabaticcomponent
verification ladder T0 review T1 audit T2 compute T3 formal
0 comments
read the original abstract

In this exploratory study, we investigate the bounds on the equation of state of dark matter. Modeling dark matter as a fluid component, we take into account both positive and negative fixed equations of state. Using CMB, supernovae Ia and large scale structure data we find constraints on the equation of state in a modified LambdaCDM cosmology. We obtain -1.50 x 10^{-6} < w_{dm} < 1.13 x 10^{-6} if the dark matter produces no entropy and -8.78 x 10^{-3}< w_{dm} < 1.86 x 10^{-3} if the adiabatic sound speed vanishes, both at 3 sigma confidence level.

Discussion (0). Sign in to comment.

Forward citations

Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. OpenAlex reports about 80 citations worldwide. Full citation record

  1. Accelerating scaling solutions from dark matter particle creation

    gr-qc 2026-04 unverdicted novelty 5.0 of 10

    Accelerating scaling attractors without dark energy appear only when the interaction is controlled by DM density and energy flows from DM to a barotropic fluid.

  2. Is Dark Energy an Effective Manifestation of Non-equilibrium Thermodynamics? -- Insights from DESI

    astro-ph.CO 2025-07 conditional novelty 5.0 of 10

    Two phenomenological dark matter creation rates can reproduce the accelerated expansion of the universe and fit current background data as well as or slightly better than LambdaCDM for some DESI-based data combinations.

  3. Exploring non-cold dark matter in a scenario of dynamical dark energy with DESI DR2 data

    astro-ph.CO 2025-07 conditional novelty 5.0 of 10

    Using DESI DR2, Planck, and supernova data, a nonzero dark matter equation of state is preferred at 2.8 to 3.3 sigma only when dark energy is assumed to have a constant equation of state.

  4. Dark Energy in the DESI Era: A Brief Review of Evidence, Beyond-$\Lambda$CDM Interpretations, and Tensions

    astro-ph.CO 2026-06 unverdicted novelty 3.0 of 10

    Review of DESI evidence for dynamical dark energy, its dependence on parametrization and datasets, and alternative beyond-LambdaCDM interpretations that may address cosmological tensions.

Pith tools