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| HAL: hal-00692526, version 1 |
| arXiv: 1204.5042 |
| DOI: 10.1088/1475-7516/2012/07/040 |
| Detailed view |  Export this paper |
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| Journal of Cosmology and Astroparticle Physics 07 (2012) 040 |
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| Isocurvature modes in the CMB bispectrum |
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| D. Langlois1, 2Bartjan Van Tent3 |
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| (2012-07) |
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| We study the angular bispectrum of local type arising from the (possibly correlated) combination of a primordial adiabatic mode with an isocurvature one. Generically, this bispectrum can be decomposed into six elementary bispectra. We estimate how precisely CMB data, including polarization, can enable us to measure or constrain the six corresponding amplitudes, considering separately the four types of isocurvature modes (CDM, baryon, neutrino density, neutrino velocity). Finally, we discuss how the model-independent constraints on the bispectrum can be combined to get constraints on the parameters of multiple-field inflation models. |
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| 1: | APC - AstroParticule et Cosmologie |
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| 2: | IAP - Institut d'Astrophysique de Paris |
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| 3: | LPT - Laboratoire de Physique Théorique d'Orsay |
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| APC - THEORIE |
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| Subject | : | Physics/General Relativity and Quantum Cosmology Physics/High Energy Physics - Theory |
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| Fulltext link: |
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| http://fr.arXiv.org/abs/1204.5042 |
| hal-00692526, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00692526 | |
| oai:hal.archives-ouvertes.fr:hal-00692526 | |
| From: Patricia Dubois-Violette | |
| Submitted on: Monday, 30 April 2012 17:23:37 | |
| Updated on: Monday, 17 September 2012 15:15:07 | |
