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- Centre National de la Recherche ScientifiqueFR276 papers
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239 papers · 1 filter
Vainshtein Solutions Without Superluminal Modes
Gregory Gabadadze, Rampei Kimura, David Pirtskhalava
The Vainshtein mechanism suppresses the fifth force at astrophysical distances, while enabling it to compete with gravity at cosmological scales. Typically, Vainshtein solutions ex…
No-Signalling Is Equivalent To Free Choice of Measurements
Samson Abramsky, Adam Brandenburger, Andrei Savochkin
No-Signalling is a fundamental constraint on the probabilistic predictions made by physical theories. It is usually justified in terms of the constraints imposed by special relativ…
Quantum Exclusion of Positive Cosmological Constant?
Gia Dvali, Cesar Gomez
We show that a positive cosmological constant is incompatible with the quantum-corpuscular resolution of de Sitter metric in form of a coherent state. The reason is very general an…
PRIMUS: Effect of Galaxy Environment on the Quiescent Fraction Evolution at z < 0.8
ChangHoon Hahn, Michael R. Blanton, John Moustakas +6
We investigate the effects of galaxy environment on the evolution of the quiescent fraction () from z =0.8 to 0.0 using spectroscopic redshifts and multi-wavelength i…
Type Ia Supernova Distance Modulus Bias and Dispersion From K-correction Errors: A Direct Measurement Using Lightcurve Fits to Observed Spectral Time Series
C. Saunders, G. Aldering, P. Antilogus +34
We estimate systematic errors due to K-corrections in standard photometric analyses of high redshift Type Ia supernovae. Errors due to K-correction occur when the spectral template…
Ultraviolet Spectroscopy of Type IIb Supernovae: Diversity and the Impact of Circumstellar Material
Sagi Ben-Ami, Stephan Hachinger, Avishay Gal-Yam +9
We present new Hubble Space Telescope (HST) multi-epoch ultraviolet (UV) spectra of the bright Type IIb SN 2013df, and undertake a comprehensive anal- ysis of the set of four Type…