تقرير
Constraining dark energy with the integrated Sachs-Wolfe effect
| العنوان: | Constraining dark energy with the integrated Sachs-Wolfe effect |
|---|---|
| المؤلفون: | Seraille, Emeric, Noller, Johannes, Sherwin, Blake D. |
| سنة النشر: | 2024 |
| المجموعة: | Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Theory |
| مصطلحات موضوعية: | Astrophysics - Cosmology and Nongalactic Astrophysics, General Relativity and Quantum Cosmology, High Energy Physics - Theory |
| الوصف: | We use the integrated Sachs-Wolfe (ISW) effect, by now detectable at $\sim 5\sigma$ within the context of $\Lambda{}$CDM cosmologies, to place strong constraints on dynamical dark energy theories. Working within an effective field theory framework for dark energy we find that including ISW constraints from galaxy-CMB cross-correlations significantly strengthens existing large-scale structure constraints, yielding bounds consistent with $\Lambda{}$CDM and approximately reducing the viable parameter space by $\sim 70\%$. This is a direct consequence of ${\cal O}(1)$ changes induced in these cross-correlations by otherwise viable dark energy models, which we discuss in detail. We compute constraints by adapting the $\Lambda{}$CDM ISW likelihood from [1] for dynamical dark energy models using galaxy data from 2MASS, WISE $\times$ SuperCOSMOS, SDSS-DR12, QSOs and NVSS, CMB data from Planck 18, and BAO and RSD large scale structure measurements from BOSS and 6dF. We show constraints both in terms of EFT-inspired $\alpha_i$ and phenomenological $\mu/\Sigma$ parametrisations. Furthermore we discuss the approximations involved and related aspects of bias modelling in detail and highlight what these constraints imply for the underlying dark energy theories. Comment: 11 pages + appendices and references, 11 figures |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2401.06221 |
| رقم الأكسشن: | edsarx.2401.06221 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |