Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aps..ses.ja002c&link_type=abstract
American Physical Society, 71st Annual Meeting of the Southeastern Section, 11-13 November, 2004, Oak Ridge, TN. MEETING ID: S
Astronomy and Astrophysics
Astronomy
Scientific paper
We use the Gu-Huang model[1] for special case when universe is seven dimensional[2]. In the core of the extra dimension we place a modified Gidding-Strominger wormhole[3]. This wormhole is separated by a thin wall from the extra dimensional space. The wormhole content is assumed to satisfy the adiabatic gas law. The wormhole pressure penetrates into the extra dimension. We then solve the Einstein equation assuming that the real universe and the extra dimension contains only inextendable fluid with negligible local pressure. We show the physical universe expands because the time dependent Hubble parameter is positive. Under certain condition the deacceleration parameter, q_0, is positive indicating the acceleration of the physical universe. [1]Je-An Gu and W-Y. P. Huang, arXiv:astro-ph/0112565 v1 31 Dec 2001. [2]A. L. Choudhury, arXiv:gr-qc/0311043 v1 13 Nov. 2003. [3]S. B. Giddings and A. Strominger, Nucl. Phys. B307, 854 (1988).
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