α-attractor dark energy in view of next-generation cosmological surveys
Abstract
The α-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. Here, we study the expected constraints that next-generation cosmological experiments will be able to impose for the dark energy α-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.
- Authors:
-
- Consejo Superior de Investigaciones Cientificas (CSIC), Madrid (Spain); Institut de Ciencies del Cosmos (UB-IEEC), Barcelona (Spain); Univ. of California, Berkeley, CA (United States). Berkeley Center for Cosmological Physics; Univ. of Oxford (United Kingdom)
- Consejo Superior de Investigaciones Cientificas (CSIC), Madrid (Spain); Institut de Ciencies del Cosmos (UB-IEEC), Barcelona (Spain)
- Univ. of Oxford (United Kingdom)
- Univ. of California, Berkeley, CA (United States). Berkeley Center for Cosmological Physics; Universite Paris-Saclay, Orsay (France)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC); Ministry of Industry, Science and Innovation of Spain; European Social Fund (ESF); Science and Technology Facilities Council (STFC) (United Kingdom)
- OSTI Identifier:
- 1581073
- Grant/Contract Number:
- AC02-05CH11231; AYA2015-67854-P; BES-2016-077038; ST/P004474/1
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Cosmology and Astroparticle Physics
- Additional Journal Information:
- Journal Volume: 2019; Journal Issue: 07; Journal ID: ISSN 1475-7516
- Publisher:
- Institute of Physics (IOP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS
Citation Formats
García-García, Carlos, Ruíz-Lapuente, Pilar, Alonso, David, and Zumalacárregui, M. α-attractor dark energy in view of next-generation cosmological surveys. United States: N. p., 2019.
Web. doi:10.1088/1475-7516/2019/07/025.
García-García, Carlos, Ruíz-Lapuente, Pilar, Alonso, David, & Zumalacárregui, M. α-attractor dark energy in view of next-generation cosmological surveys. United States. https://doi.org/10.1088/1475-7516/2019/07/025
García-García, Carlos, Ruíz-Lapuente, Pilar, Alonso, David, and Zumalacárregui, M. Tue .
"α-attractor dark energy in view of next-generation cosmological surveys". United States. https://doi.org/10.1088/1475-7516/2019/07/025. https://www.osti.gov/servlets/purl/1581073.
@article{osti_1581073,
title = {α-attractor dark energy in view of next-generation cosmological surveys},
author = {García-García, Carlos and Ruíz-Lapuente, Pilar and Alonso, David and Zumalacárregui, M.},
abstractNote = {The α-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. Here, we study the expected constraints that next-generation cosmological experiments will be able to impose for the dark energy α-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.},
doi = {10.1088/1475-7516/2019/07/025},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 07,
volume = 2019,
place = {United States},
year = {Tue Jul 16 00:00:00 EDT 2019},
month = {Tue Jul 16 00:00:00 EDT 2019}
}
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Cited by: 8 works
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Figures / Tables:
Figure 1: Galaxy density distributions for red, blue and gold samples of LSST. Dashed lines show the windows functions (W i ∝ $\bar N$(z)wi(z)) for each redshift bin.
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