Galileon gravity in light of ISW, CMB, BAO and H0 data
By Janina J. Renk, M. Zumalacárregui, Francesco Montanari, A. Barreira. 2017
188 citations recorded by the source corpus.
Cosmological models with Galileon gravity are an alternative to the standard ΛCDM paradigm with testable predictions at the level of its self-accelerating solutions for the expansion history, as well as large-scale structure formation. Here, we place constraints on the full parameter space of these models using data from the cosmic microwave background (CMB) (including lensing), baryonic acoustic oscillations (BAO) and the Integrated Sachs-Wolfe (ISW) effect. We pay special attention to the ISW effect for which we use the cross-spectra, CℓTg, of CMB temperature maps and foreground galaxies from the WISE survey. The sign of CℓTg is set by the time evolution of the lensing potential in the redshift range of the galaxy sample: it is positive if the potential decays (like in ΛCDM), negative if it deepens. We constrain three subsets of Galileon gravity separately known as the Cubic, Quartic and Quintic Galileons. The cubic Galileon model predicts a negative CℓTg and exhibits a 7.8σ tension with the data, which effectively rules it out. For the quartic and quintic models the ISW data also rule out a significant portion of the parameter space but permit regions where the goodness-of-fit is comparable to ΛCDM. The data prefers a non zero sum of the neutrino masses (∑mν ≈ 0.5eV) with ∼ 5σ significance in these models. The best-fitting models have values of H0 consistent with local determinations, thereby avoiding the tension that exists in ΛCDM. We also identify and discuss a ∼ 2σ tension that Galileon gravity exhibits with recent BAO measurements. Our analysis shows overall that Galileon cosmologies cannot be ruled out by current data but future lensing, BAO and ISW data hold strong potential to do so.
Subfields: Astronomy and Astrophysics
View Paper: https://www.semanticscholar.org/paper/8256e69922400fa5bd2c8397b70b39f8ad6356b6
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In Astronomy and Astrophysics
Citations in the corpus
- Implications of an extended dark energy cosmology with massive neutrinos for cosmological tensions (2018, background): “[70] Janina Renk, Miguel Zumalacrregui, Francesco Montanari, and Alexandre Barreira, “Galileon gravity in light of ISW, CMB, BAO and H0 data,” JCAP 1710, 020 (2017), arXiv:1707.”
- Measuring the Hubble constant with Type Ia supernovae as near-infrared standard candles (2017, background): “…physics”, including possibilities like additional species of relativistic particles, non-zero curvature, dark radiation or even a modification of the equations of general relativity (e.g., see Verde et al. 2017; Di Valentino et al. 2017; Sasankan et al. 2017; Dhawan et al. 2017a; Renk et al. 2017).”
- Cosmology Intertwined II: The Hubble Constant Tension (2020, unknown): “[50] J.”