1999/02/12 by Ishwaree P. Neupane, Neupane, Ishwaree P.
Physics and Astronomy · #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #gr-qc
paper · pdf · doi:10.48550/arxiv.gr-qc/9902039
6 pages, RevTex, some corrections on gr-qc/9812096
arxiv created 1999/02/12 · arxiv updated 2009/11/30
A contribution of quantum vacuum to the energy momentum tensor is inevitably experienced in the present universe. One requires the presence of non-zero cosmological constant (Λ) to make the various observations consistent. A case of Λ in the Schwarzschild de Sitter space-time shows that precession of perihelion orbit provides a sensative solar test for non-zero Λ. Application of the relations involving Λ to the planetery perturbation indicates the values near to the present bound on Λ. Also suggested are some relations in vacuum dominated flat universe with a positive Λ.