Journal articles
Improved constraint on the primordial gravitational-wave density using recent cosmological data and its impact on cosmic string models
S. Henrot-Versillé
1
F. Robinet
1
N. Leroy
1
Stéphane Plaszczynski
1
N. Arnaud
1
M.-A. Bizouard
1
F. Cavalier
1
N. Christensen
2, 1
F. Couchot
1
S. Franco
1
P. Hello
1
D. Huet
1
M. Kasprzack
1
O. Perdereau
1
M. Spinelli
1
M. Tristram
1
S. Henrot-Versillé 1
Author IdHAL : sophie-henrot-versille ORCID : https://orcid.org/0000-0003-1218-2991
F. Robinet 1
Author
N. Leroy 1
Author IdHAL : nicolas-leroy-cnrs ORCID : https://orcid.org/0000-0002-2321-1017
Stéphane Plaszczynski 1
Author IdHAL : stephane-plaszczynski ORCID : https://orcid.org/0000-0002-1278-109X
F. Couchot 1
Author IdHAL : francois-couchot2 arXiv : https://arxiv.org/a/couchot ORCID : https://orcid.org/0000-0002-7714-7700
S. Franco 1
Author
P. Hello 1
Author
D. Huet 1
Author
M. Kasprzack 1
Author
O. Perdereau 1
Author
M. Spinelli 1
Author
M. Tristram 1
Author IdHAL : matthieu-tristram ORCID : https://orcid.org/0000-0001-7276-8324
1
LAL - Laboratoire de l'Accélérateur Linéaire (Centre Scientifique d'Orsay B.P. 34 91898 ORSAY Cedex - France)
- UP11 - Université Paris-Sud - Paris 11 (Bâtiment 300 - 91405 Orsay cedex - France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- CNRS - Centre National de la Recherche Scientifique : UMR8607 (France)
2
Department of Physics and Astronomy [Northfield] (Northfield, MN, 55057 - United States)
- Carleton College (Carleton College, Northfield, MN 55057, USA - United States)
Abstract : The production of a primordial stochastic gravitational-wave (GW) background by processes occuring in the early Universe is expected in a broad range of models. Observing this background would open a unique window onto the Universeʼs evolutionary history. Probes like the cosmic microwave background (CMB) or the baryon acoustic oscillations (BAO) can be used to set upper limits on the stochastic GW background energy density ${{\Omega }_{{\rm GW}}}$ for frequencies above 10−15 Hz. We perform a profile likelihood analysis of the Planck CMB temperature anisotropies and gravitational lensing data combined with WMAP low-ℓ polarization, BAO, South Pole Telescope and Atacama Cosmology Telescope data. We find that ${{\Omega }_{{\rm GW}}}{\rm h}_{0}^{2}\lt 3.8\times {{10}^{-6}}$ at a 95% confidence level for adiabatic initial conditions, which improves over the previous limit by a factor 2.3. Assuming that the primordial GW has been produced by a network of cosmic strings, we have derived exclusion limits in the cosmic string parameter space. If the size of the loops is determined by gravitational back-reaction, string tension values greater than ~4 × ${{10}^{-9}}$ are excluded for a reconnection probability of 10−3.
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Journal articles
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http://hal.in2p3.fr/in2p3-01107320
Contributor : Sabine Starita <>
Submitted on : Tuesday, January 20, 2015 - 5:14:19 PM
Last modification on : Wednesday, January 6, 2021 - 9:14:04 AM
Contributor : Sabine Starita <>
Submitted on : Tuesday, January 20, 2015 - 5:14:19 PM
Last modification on : Wednesday, January 6, 2021 - 9:14:04 AM
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- HAL Id : in2p3-01107320, version 1
- DOI : 10.1088/0264-9381/32/4/045003
- ARXIV : 1408.5299
Citation
S. Henrot-Versillé, F. Robinet, N. Leroy, Stéphane Plaszczynski, N. Arnaud, et al.. Improved constraint on the primordial gravitational-wave density using recent cosmological data and its impact on cosmic string models. Classical and Quantum Gravity, IOP Publishing, 2015, 32 (4), pp.045003. ⟨10.1088/0264-9381/32/4/045003⟩. ⟨in2p3-01107320⟩
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