Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 480, Issue 4, Pages 5386-5411Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/sty2160
Keywords
cosmic background radiation; cosmological parameters; dark energy; large-scale structure of Universe
Categories
Funding
- National Council for Scientific and Technological Development - Brazil (CNPq) [202131/2014-9]
- National Council for Scientific and Technological Development - Brazil (PCI/MCTIC/CBPF program)
- Labex ENIGMASS
- CNPq (PCI/MCTIC/CBPF program)
- BELSPO non-EU postdoctoral fellowship
- Alfred P. Sloan Foundation
- National Science Foundation
- U.S. Department of Energy Office of Science
- University of Arizona
- Brazilian Participation Group
- Brookhaven National Laboratory
- Carnegie Mellon University
- University of Florida
- French Participation Group
- German Participation Group
- Harvard University
- Instituto de Astrofisica de Canarias
- Michigan State/Notre Dame/JINA Participation Group
- Johns Hopkins University
- Lawrence Berkeley National Laboratory
- Max Planck Institute for Astrophysics
- Max Planck Institute for Extraterrestrial Physics
- NewMexico State University
- New York University
- Ohio State University
- Pennsylvania State University
- University of Portsmouth
- Princeton University
- Spanish Participation Group
- University of Tokyo
- University of Utah
- Vanderbilt University
- University of Virginia
- University of Washington
- Yale University
- ESA Member States
- NASA
Ask authors/readers for more resources
The standard model of cosmology, lambda cold dark matter (Lambda CDM), is the simplest model that matches the current observations, but it relies on two hypothetical components, to wit, dark matter and dark energy. Future galaxy surveys and cosmic microwave background (CMB) experiments will independently shed light on these components, but a joint analysis that includes cross-correlations will be necessary to extract as much information as possible from the observations. In this paper, we carry out a multiprobe analysis based on pseudo-spectra and test it on publicly available data sets. We use CMB temperature anisotropies and CMB lensing observations from Planck as well as the spectroscopic galaxy and quasar samples of SDSS-III/BOSS, taking advantage of the large areas covered by these surveys. We build a likelihood to simultaneously analyse the auto and cross spectra of CMB lensing and tracer overdensity maps before running Markov chain Monte Carlo to assess the constraining power of the combined analysis. We then add the CMB temperature anisotropies likelihood and obtain constraints on cosmological parameters (H-0, omega(b), omega(c), In 10(10) A(s), n(s) and z(re)) and galaxy biases. We demonstrate that the joint analysis can additionally constrain the total mass of neutrinos Sigma m(v), as well as the dark energy equation of state w at once (for a total of eight cosmological parameters), which is impossible with either of the data sets considered separately. Finally, we discuss limitations of the analysis related to, e.g. the theoretical precision of the models, particularly in the non-linear regime.
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