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Relativistic second-order initial conditions for simulations of large-scale structure

Autor: Adamek, J., Calles, J., Montandon, T., Noreña, J., Stahl, C.

Publikováno v: JCAP 04 (2022) 001

Relativistic corrections to the evolution of structure can be used to test general relativity on cosmological scales. They are also a well-known systematic contamination in the search for a primordial non-Gaussian signal. We present a numerical frame

Externí odkaz: http://arxiv.org/abs/2110.11249

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FRW and domain walls in higher spin gravity

Autor: Aros, R., Iazeolla, C., Noreña, J., Sezgin, E., Sundell, P., Yin, Y.

We present exact solutions to Vasiliev's bosonic higher spin gravity equations in four dimensions with positive and negative cosmological constant that admit an interpretation in terms of domain walls, quasi-instantons and Friedman-Robertson-Walker (

Externí odkaz: http://arxiv.org/abs/1712.02401

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Non-Gaussianities due to Relativistic Corrections to the Observed Galaxy Bispectrum

Autor: Di Dio, E., Perrier, H., Durrer, R., Marozzi, G., Dizgah, A. Moradinezhad, Noreña, J., Riotto, A.

Publikováno v: JCAP 03 (2017) 006

High-precision constraints on primordial non-Gaussianity (PNG) will significantly improve our understanding of the physics of the early universe. Among all the subtleties in using large scale structure observables to constrain PNG, accounting for rel

Externí odkaz: http://arxiv.org/abs/1611.03720

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A Consistency Relation for the Observed Galaxy Bispectrum and the Local non-Gaussianity from Relativistic Corrections

Autor: Kehagias, A., Dizgah, A. Moradinezhad, Noreña, J., Perrier, H., Riotto, A.

We obtain a consistency relation for the observed three-point correlator of galaxies. It includes relativistic effects and it is valid in the squeezed limit. Furthermore, the consistency relation is non-perturbative and can be used at arbitrarily sma

Externí odkaz: http://arxiv.org/abs/1503.04467

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A Consistency Relation for the CMB B-mode Polarization in the Squeezed Limit

Autor: Kehagias, A., Moradinezhad-Dizgah, A., Noreña, J., Perrier, H., Riotto, A.

A large-scale temperature perturbation has a non-zero correlation with the power spectrum of B-modes of cosmological origin on short scales while the corresponding correlation is expected to be zero for B-modes sourced by galactic foregrounds. We thu

Externí odkaz: http://arxiv.org/abs/1407.6223

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