Constraints on Horndeski Gravity with Phantom Crossing

Clicks: 13
ID: 332288
2026
Free PDF
Article Quality & Performance Metrics
Overall Quality
Not rated
Combines reader engagement with the AI quality analysis. This article has not been analysed, so there is no overall score — reader engagement is measured and shown alongside.
AI Quality Assessment
Not analyzed
Readership in this journal
Emerging

Ranked #1,028 of 1,327 articles by views in monthly notices of the royal astronomical society

Most read Least read

Bar heights use a square-root scale. Only the 120 most-read articles are drawn; the journal has 1,327 in total.

Mint this article as an NFT
Not yet minted

Create a permanent, verifiable on-chain record of this article on the Scimatic Network. The NFT is held in your Journament account, and you can withdraw it to your own wallet at any time.

5 SUSD one-off · no wallet required
Sign in to mint
Abstract
Abstract Gravity models in which the dark energy equation of state crosses w = −1, also known as the phantom divide, have received extensive interest due to recent analyses favouring this behaviour. We introduce a new subclass of Horndeski scalar-tensor models capable of generating phantom crossing, whilst remaining minimally coupled to matter: the Asymptotic Cubic Galileon (ACG) models. We show that ACG models can jointly fit the expansion history inferred from observations of the Planck cosmic microwave background, baryon acoustic oscillation measurements from the Dark Energy Spectroscopic Instrument, and distance-ladder supernovae measurements from the Dark Energy Survey. We then demonstrate that requiring a positive galaxy-ISW cross-correlation, together with physically viable screening behaviour, substantially restricts the viable ACG parameter space. Model comparison metrics, including χ2 and Bayesian evidence, favour both ACG and w0waCDM models over ΛCDM, with ACG providing a fit of comparable quality to w0waCDM. Crucially, ACG models ground the observationally preferred w0waCDM behaviour in a robust Lagrangian formulation. This enables interpretation beyond mere phenomenological fits, and motivates further tests of these models on nonlinear scales.
Reference Key
openalex_W7165677248 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Krishna Naidoo, James Hallam, Tessa Baker, Sergi Sirera
Are you one of these authors? Claim your profile
Journal monthly notices of the royal astronomical society
Year 2026
DOI
10.1093/mnras/stag1958
URL
https://doi.org/10.1093/mnras/stag1958
Keywords Keywords not found

Citations

No citations found. To add a citation, contact the admin at info@scimatic.org

Comments

No comments yet. Be the first to comment on this article.