Turkish Journal of Physics
Abstract
A new phenomenological dark energy model, originally associated with large-scale structure formation and proposed as a solution to the fine-tuning and coincidence problems related to the cosmological constant, was analyzed within the framework of General Relativity in a Friedmann-Robertson-Walker spacetime and its model parameters were estimated using cosmic chronometers and recent DESI data. It turns out that the proposed model can serve as an alternative evolving dark energy model with a novel equation of state function. Given the form of this phenomenological energy density ansatz, which rises with the nonlinear structure growth in the universe and declines as cosmic voids come to dominate, we prefer to call it structure-induced dark energy. Observational constraints show that the model is not only a viable solution to fundamental issues such as the coincidence and fine-tuning problems, but also a flexible framework for addressing cosmic tensions and offering a new perspective on evolving dark-energy models.
Author ORCID Identifier
ALİ ÇAMLIBEL: 0000-0003-0060-7809
DOI
10.55730/1300-0101.2819
Keywords
Cosmic acceleration, evolving dark energy, phenomenology
First Page
273
Last Page
282
Publisher
The Scientific and Technological Research Council of Türkiye (TÜBİTAK)
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Recommended Citation
ÇAMLIBEL, A. K (2026). Observational constraints on the structure-induced dark energy model. Turkish Journal of Physics 50 (4): 273-282. https://doi.org/10.55730/1300-0101.2819
