# Weak lensing cosmology beyond ΛCDM

## Abstract

Weak gravitational lensing is one of the key probes of the cosmological model, dark energy, and dark matter, providing insight into both the cosmic expansion history and large scale structure growth history. Taking into account a broad spectrum of physics affecting growth — dynamical dark energy, extended gravity, neutrino masses, and spatial curvature — we analyze the cosmological constraints. Similarly we consider the effects of a range of systematic uncertainties, in shear measurement, photometric redshifts, intrinsic alignments, and the nonlinear power spectrum, on cosmological parameter extraction. We also investigate, and provide fitting formulas for, the influence of survey parameters such as redshift depth, galaxy number densities, and sky area on the cosmological constraints in the beyond-ΛCDM parameter space. Finally, we examine the robustness of results for different fiducial cosmologies.

- Authors:

- Berkeley Center for Cosmological Physics, University of California, Berkeley, CA (United States)
- IFIC, Universidad de Valencia-CSIC, Valencia (Spain)

- Publication Date:

- OSTI Identifier:
- 22279680

- Resource Type:
- Journal Article

- Journal Name:
- Journal of Cosmology and Astroparticle Physics

- Additional Journal Information:
- Journal Volume: 2012; Journal Issue: 11; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1475-7516

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COSMOLOGICAL CONSTANT; COSMOLOGICAL MODELS; COSMOLOGY; DENSITY; EXPANSION; GALAXIES; GRAVITATION; GRAVITATIONAL LENSES; MASS; NEUTRINOS; NONLINEAR PROBLEMS; NONLUMINOUS MATTER; RED SHIFT

### Citation Formats

```
Das, Sudeep, Linder, Eric V., Nakajima, Reiko, and Putter, Roland de, E-mail: sdas@hep.anl.gov, E-mail: rdeputter@icc.ub.edu, E-mail: evlinder@lbl.gov, E-mail: reiko@astro.uni-bonn.de.
```*Weak lensing cosmology beyond ΛCDM*. United States: N. p., 2012.
Web. doi:10.1088/1475-7516/2012/11/011.

```
Das, Sudeep, Linder, Eric V., Nakajima, Reiko, & Putter, Roland de, E-mail: sdas@hep.anl.gov, E-mail: rdeputter@icc.ub.edu, E-mail: evlinder@lbl.gov, E-mail: reiko@astro.uni-bonn.de.
```*Weak lensing cosmology beyond ΛCDM*. United States. doi:10.1088/1475-7516/2012/11/011.

```
Das, Sudeep, Linder, Eric V., Nakajima, Reiko, and Putter, Roland de, E-mail: sdas@hep.anl.gov, E-mail: rdeputter@icc.ub.edu, E-mail: evlinder@lbl.gov, E-mail: reiko@astro.uni-bonn.de. Thu .
"Weak lensing cosmology beyond ΛCDM". United States. doi:10.1088/1475-7516/2012/11/011.
```

```
@article{osti_22279680,
```

title = {Weak lensing cosmology beyond ΛCDM},

author = {Das, Sudeep and Linder, Eric V. and Nakajima, Reiko and Putter, Roland de, E-mail: sdas@hep.anl.gov, E-mail: rdeputter@icc.ub.edu, E-mail: evlinder@lbl.gov, E-mail: reiko@astro.uni-bonn.de},

abstractNote = {Weak gravitational lensing is one of the key probes of the cosmological model, dark energy, and dark matter, providing insight into both the cosmic expansion history and large scale structure growth history. Taking into account a broad spectrum of physics affecting growth — dynamical dark energy, extended gravity, neutrino masses, and spatial curvature — we analyze the cosmological constraints. Similarly we consider the effects of a range of systematic uncertainties, in shear measurement, photometric redshifts, intrinsic alignments, and the nonlinear power spectrum, on cosmological parameter extraction. We also investigate, and provide fitting formulas for, the influence of survey parameters such as redshift depth, galaxy number densities, and sky area on the cosmological constraints in the beyond-ΛCDM parameter space. Finally, we examine the robustness of results for different fiducial cosmologies.},

doi = {10.1088/1475-7516/2012/11/011},

journal = {Journal of Cosmology and Astroparticle Physics},

issn = {1475-7516},

number = 11,

volume = 2012,

place = {United States},

year = {2012},

month = {11}

}