New Model-independent Method to Test the Curvature of the Universe
Abstract
We propose a new model-independent method to test the cosmic curvature by comparing the proper distance and transverse comoving distance. Using the measurements of the Hubble parameter H(z) and the angular diameter distance d A , the cosmic curvature parameter {{{Ω }}}K is constrained to be -0.09 ± 0.19, which is consistent with a flat universe. We also use a Monte Carlo simulation to test the validity and efficiency, and find that our method can give a reliable and efficient constraint on cosmic curvature. Compared with other model-independent methods testing the cosmic curvature, our method can avoid some drawbacks and give a better constraint.
- Publication:
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The Astrophysical Journal
- Pub Date:
- September 2016
- DOI:
- 10.3847/0004-637X/828/2/85
- arXiv:
- arXiv:1605.02483
- Bibcode:
- 2016ApJ...828...85Y
- Keywords:
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- cosmological parameters;
- cosmology: observations;
- Astrophysics - Cosmology and Nongalactic Astrophysics
- E-Print:
- 22 pages, 8 figures, 3 tables, match the published version