123 citations · 749 across the 24 of their papers we have counts for
24 papers
Hierarchical clustering and the BAO signature
Wojciech A. Hellwing, Roman Juszkiewicz, Rien van de Weygaert +1
In this contribution we present the preliminary results regarding the non-linear BAO signal in higher-order statistics of the cosmic density field. We use ensembles of N-body simul…
Skewness as a probe of Baryon Acoustic Oscillations
Roman Juszkiewicz, Wojciech A. Hellwing, Rien van de Weygaert
In this study we show that the skewness S_3 of the cosmic density field contains a significant and potentially detectable and clean imprint of Baryonic Acoustic Oscillations. Altho…
DM haloes in the fifth-force cosmology
Wojciech A. Hellwing, Marius Cautun, Alexander Knebe +2
We investigate how long-range scalar interactions affect the properties of dark matter haloes. For doing so we employ the ReBEL model which implements an additional interaction bet…
Hierarchy of N-point functions in the LCDM and ReBEL cosmologies
Wojciech A. Hellwing, Roman Juszkiewicz, Rien van de Weygaert
In this work we investigate higher order statistics for the $\lcdm$ and ReBEL scalar-interacting dark matter models by analyzing $180\hmpc$ dark matter N-body simulation ensembles.…
Nonlinear Effects in the Amplitude of Cosmological Density Fluctuations
Roman Juszkiewicz, Hume A. Feldman, J. N. Fry +1
The amplitude of cosmological density fluctuations, sigma_8, has been studied and estimated by analysing many cosmological observations. The values of the estimates vary considerab…
Dark Matter Gravitational Clustering With a Long-Range Scalar Interaction
Wojciech A. Hellwing, Roman Juszkiewicz
We explore the possibility of improving the CDM model at megaparsec scales by introducing a scalar interaction which increases the mutual gravitational attraction of dark matter…