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The DESI Experiment Part I: Science,Targeting, and Survey Design
- Desi Collaboration Amir Aghamousa, J. Aguilar, Y. Zu
- Physics
- 31 October 2016
DESI (Dark Energy Spectroscopic Instrument) is a Stage IV ground-based dark energy experiment that will study baryon acoustic oscillations (BAO) and the growth of structure through redshift-space…
f(T) gravity and local Lorentz invariance
- Baojiu Li, T. Sotiriou, J. Barrow
- Physics
- 6 October 2010
We show that in theories of generalized teleparallel gravity, whose Lagrangians are algebraic functions of the usual teleparallel Lagrangian, the action and the field equations are not invariant…
The DESI Experiment Part II: Instrument Design
- Desi Collaboration Amir Aghamousa, J. Aguilar, Y. Zu
- Physics
- 31 October 2016
DESI (Dark Energy Spectropic Instrument) is a Stage IV ground-based dark energy experiment that will study baryon acoustic oscillations and the growth of structure through redshift-space distortions…
N-body simulations for f(R) gravity using a self-adaptive particle-mesh code.
- Gong-Bo Zhao, Baojiu Li, K. Koyama
- Physics
- 4 November 2010
We perform high resolution N-body simulations for f(R) gravity based on a self-adaptive particlemesh code MLAPM. The Chameleon mechanism that recovers General Relativity on small scales is fully…
Unified description of screened modified gravity.
- P. Brax, A. Davis, Baojiu Li, H. Winther
- Physics
- 21 March 2012
We consider modified gravity models driven by a scalar field whose effects are screened in high density regions due to the presence of nonlinearities in its interaction potential and/or its coupling…
Testing gravity using cosmic voids
- Yan-Chuan Cai, N. Padilla, Baojiu Li
- Physics, Geology
- 6 October 2014
We explore voids in dark matter and halo fields from simulatio ns ofCDM and Hu-Sawicki f(R) models. In f(R) gravity, dark matter void abundances are greater than that of general relativity (GR).…
Modeling halo mass functions in chameleon f(R) gravity
- L. Lombriser, Baojiu Li, K. Koyama, Gong-Bo Zhao
- Physics
- 23 April 2013
On cosmological scales, observations of the cluster abundance currently place the strongest constraints on f(R) gravity. These constraints lie in the large-field limit, where the modifications of…
An extended excursion set approach to structure formation in chameleon models.
- Baojiu Li, G. Efstathiou
- Physics
- 28 October 2011
In attempts to explain dark energy, a number of models have been proposed in which the formation of a large-scale structure depends on the local environment. These models are highly non-linear and…
Nonlinear structure formation in the cubic Galileon gravity model
- A. Barreira, Baojiu Li, W. Hellwing, C. Baugh, S. Pascoli
- Physics
- 13 June 2013
We model the linear and nonlinear growth of large scale structure in the Cubic Galileon gravity model, by running a suite of N-body cosmological simulations using the ECOSMOG code. Our simulations…
The non-linear matter and velocity power spectra in f(R) gravity
- Baojiu Li, W. Hellwing, K. Koyama, Gong-Bo Zhao, E. Jennings, C. Baugh
- Physics
- 19 June 2012
We study the matter and velocity divergence power spectra in a f(R) gravity theory and their time evolution measured from several large-volume N-body simulations with varying box sizes and…
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