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Título: | α-attractor dark energy in view of next-generation cosmological surveys |
Autor: | García-García, Carlos CSIC ORCID; Ruiz-Lapuente, Pilar CSIC ORCID; Alonso, David CSIC ORCID ; Zumalacárregui, M. | Fecha de publicación: | 16-jul-2019 | Editor: | IOP Publishing | Citación: | Journal of Cosmology and Astroparticle Physics 2019: 1- 22 (2019) | Resumen: | The ¿-attractor inflationary models are nowadays favored by CMB Planck observations. Their similarity with canonical quintessence models motivates the exploration of a common framework that explains both inflation and dark energy. We study the expected constraints that next-generation cosmological experiments will be able to impose for the dark energy ¿-attractor model. We systematically account for the constraining power of SNIa from WFIRST, BAO from DESI and WFIRST, galaxy clustering and shear from LSST and Stage-4 CMB experiments. We assume a tensor-to-scalar ratio, 10¿3 < r < 10¿2, which permits to explore the wide regime sufficiently close, but distinct, to a cosmological constant, without need of fine tunning the initial value of the field. We find that the combination S4CMB + LSST + SNIa will achieve the best results, improving the FoM by almost an order of magnitude; respect to the S4CMB + BAO + SNIa case. We find this is also true for the FoM of the w0 ¿ wa parameters. Therefore, future surveys will be uniquely able to probe models connecting early and late cosmic acceleration. | Descripción: | 22 pags., 10 figs. | Versión del editor: | http://dx.doi.org/10.1088/1475-7516/2019/07/025 | URI: | http://hdl.handle.net/10261/207551 | DOI: | 10.1088/1475-7516/2019/07/025 | Identificadores: | doi: 10.1088/1475-7516/2019/07/025 issn: 1475-7516 |
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α-attractor dark.pdf | 2,01 MB | Adobe PDF | Visualizar/Abrir |
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