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- Centre National de la Recherche ScientifiqueFR640 papers
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9 papers · 2 filters
Features in the primordial power spectrum? A frequentist analysis
Jan Hamann, Arman Shafieloo, Tarun Souradeep
Features in the primordial power spectrum have been suggested as an explanation for glitches in the angular power spectrum of temperature anisotropies measured by the WMAP satellit…
Single-field inflation constraints from CMB and SDSS data
Fabio Finelli, Jan Hamann, Samuel M. Leach +1
We present constraints on canonical single-field inflation derived from WMAP five year, ACBAR, QUAD, BICEP data combined with the halo power spectrum from SDSS LRG7. Models with a…
VLT/NACO near-infrared imaging and spectroscopy of N88A in the SMC
G. Testor, J. L. Lemaire, M. Heydari-Malayeri +3
We present near-infrared imaging and spectroscopic high spatial resolution observations of the SMC region N88 containing the bright, excited, extincted and compact H II region N88A…
Decaying neutrinos: The long way to isotropy
Anders Basboll, Ole Eggers Bjaelde
We investigate a scenario in which neutrinos are coupled to a pseudoscalar degree of freedom $\ph$ and where decays $ν_1 \to ν_2+\ph$ and inverse decays are the responsible mechani…
The Cosmic Neutrino Background Anisotropy - Linear Theory
Steen Hannestad, Jacob Brandbyge
The cosmic neutrino background anisotropy is calculated for massive neutrino states by solving the full Boltzmann equation. The effect of weak gravitational lensing, including the…
Resolving Cosmic Neutrino Structure: A Hybrid Neutrino N-body Scheme
Jacob Brandbyge, Steen Hannestad
We present the first simulation capable of resolving the structure of neutrino clustering on Mpc scales. The method combines grid- and particle-based methods and achieves very good…