- Open Access
Constraining quintessence models with integrated Sachs-Wolfe thermal Sunyaev-Zel’dovich cross-correlations: A comparative analysis of thawing, tracker, and scaling-freezing dynamics
Phys. Rev. D 113, 063509 – Published 3 March, 2026
DOI: https://doi.org/10.1103/grt1-234m
Abstract
We present constraints on quintessence dark energy models using the observational detection of the integrated Sachs-Wolfe (ISW)–thermal Sunyaev-Zeldovich (tSZ) cross-correlation dataset. Our analysis compares three classes of quintessence dynamics: thawing, tracker, and scaling-freezing with the standard cold dark matter () cosmology. Through a comprehensive likelihood analysis, we derive best-fit values and 68% confidence intervals for key cosmological parameters, finding and for , with deviations in alternative models consistent within . For the thawing model, we consider an exponential potential with slope , while for the tracker and scaling-freezing models, we use inverse axionlike and double exponential potentials, respectively. Observationally, the tracker model yields and , and the scaling-freezing model gives and . The dimensionless tSZ amplitude () and cosmic infrared background (CIB) parameters are tightly constrained across all models, providing additional insights into astrophysical foregrounds. Our results demonstrate the effectiveness of ISW-tSZ cross-correlations as a probe of dark energy dynamics, with the thawing quintessence model yielding the lowest among the tested scenarios, and highlight the need for future high-precision measurements to distinguish between quintessence models and .
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