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Model-independent tests of cosmic gravity
- Model-independent tests of cosmic gravity
- Linder E.V.
- Ewha Authors
- Eric V. Linder
- Issue Date
- Journal Title
- Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
- Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences vol. 369, no. 1957, pp. 4985 - 4997
- SCI; SCIE; SCOPUS
- Document Type
- Gravitation governs the expansion and fate of the universe, and the growth of large-scale structure within it, but has not been tested in detail on these cosmic scales. The observed acceleration of the expansion may provide signs of gravitational laws beyond general relativity (GR). Since the form of any such extension is not clear, from either theory or data, we adopt a model-independent approach to parametrizing deviations to the Einstein framework. We explore the phase space dynamics of two key post-GR functions and derive a classification scheme, and an absolute criterion on accuracy necessary for distinguishing classes of gravity models. Future surveys will be able to constrain the post-GR functions' amplitudes and forms to the required precision, and hence reveal new aspects of gravitation. © 2011 The Royal Society.
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- 자연과학대학 > 물리학전공 > Journal papers
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