Phys. Rev. D 58, 103511 (1998) [12 pages]Implications of cosmic repulsion for gravitational theoryReceived 1 May 1998; published 9 October 1998 We present a general, model independent analysis of a recently detected apparent cosmic repulsion, and discuss its potential implications for gravitational theories, both standard and non-standard. In particular, we show that a negatively spatially curved universe acts like a diverging refractive medium to thus naturally cause galaxies to accelerate away from each other. Additionally, we show that it is possible for a cosmic acceleration to only be temporary, with some accelerating universes actually being able to subsequently recontract. © 1998 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.58.103511
DOI:
10.1103/PhysRevD.58.103511
PACS:
98.80.Hw, 04.50.+h
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