Results 1 to 10 of about 1,495 (192)
Observations in quantum cosmology
Classical and Quantum Gravity, 2023 AbstractIn this review, we focus on whether a canonical quantization of general relativity can produce testable predictions for cosmology. In particular, we examine how this approach can be used to model the evolution of primordial perturbations.
Leonardo Chataignier +2 more
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Revisiting geodesic observers in cosmology [PDF]
The European Physical Journal C, 2021 AbstractGeodesic observers in cosmology are revisited. The coordinates based on freely falling observers introduced by Gautreau in de Sitter and Einstein-de Sitter spaces (and, previously, by Gautreau and Hoffmann in Schwarzschild space) are extended to general FLRW universes.
Geneviève Vachon +2 more
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Proceedings of European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2019), 2020 International audience; Despite the title, I am afraid that I will not be able to really do justice to the broad topic I was given to review. But I will show the current striking level of precise consistency between the CMB and LSS data \textit{within the \LCDM\ theoretical framework} (with the acronyms CMB and LSS standing for Cosmic Microwave ...
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Predicting cosmological observables with PyCosmo
Astronomy and Computing, 2021 Astronomy and Computing ...
F. Tarsitano +9 more
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Republication of: Observations in cosmology [PDF]
General Relativity and Gravitation, 2010 This is a reprinting of a paper by Jerome Kristian and Rainer K. Sachs, first published in 1966, in which they proposed a power-series scheme for reading out various parameters of the Universe directly from observations in a model-independent way. The paper has been selected by the Editors of General Relativity and Gravitation for re-publication in the
Jerome Kristian, Rainer K. Sachs
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Machine learning for observational cosmology
Reports on Progress in Physics, 2023 Abstract An array of large observational programs using ground-based and space-borne telescopes is planned in the next decade. The forthcoming wide-field sky surveys are expected to deliver a sheer volume of data exceeding an exabyte.
Kana Moriwaki +2 more
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Observational constraints on undulant cosmologies [PDF]
Journal of Cosmology and Astroparticle Physics, 2006 19 pages, 12 figures in 19 files, uses iopart.cls, iopart10.clo; added ...
Barenboim, Gabriela +2 more
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Space and observers in cosmology [PDF]
Astronomy & Astrophysics, 2001 I provide a prescription to define space, at a given moment, for an arbitrary observer in an arbitrary (sufficiently regular) curved space-time. This prescription, based on synchronicity (simultaneity) arguments, defines a foliation of space-time, which corresponds to a family of canonically associated observers.
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Observational aspects of an inhomogeneous cosmology [PDF]
Proceedings of VIII International Workshop on the Dark Side of the Universe — PoS(DSU 2012), 2013 One of the biggest mysteries in cosmology is Dark Energy, which is required to explain the accelerated expansion of the universe within the standard model. But maybe one can explain the observations without introducing new physics, by simply taking one step back and re-examining one of the basic concepts of cosmology, homogeneity. In standard cosmology,
Christoph Saulder +2 more
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Observational constraints on Rastall’s cosmology [PDF]
The European Physical Journal C, 2013 Latex file, 14 pages, 6 figures in eps format.
C. E. M. Batista +3 more
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