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Title: Nucleosynthesis in power-law cosmologies

Abstract

We have recently considered cosmologies in which the universal scale factor varies as a power of the age of the Universe and concluded that they cannot satisfy the observational constraints on the present age, the magnitude-redshift relation for SN Ia, and the primordial element (D, {sup 3}He, {sup 4}He, and {sup 7}Li) abundances. This claim has been challenged in a proposal that suggested a high baryon density model ({omega}{sub B}h{sup 2}{approx_equal}0.3) with an expansion factor varying linearly with time could be consistent with the observed abundance of primordial helium-4, while satisfying the age and magnitude-redshift constraints. In this paper we further explore primordial nucleosynthesis in generic power-law cosmologies, including the linear case, concluding that models selected to satisfy the other observational constraints are incapable of accounting for all the light element abundances. (c) 2000 The American Physical Society.

Authors:
 [1];  [1];  [2];  [1]
  1. Department of Physics, The Ohio State University, Columbus, Ohio 43210 (United States)
  2. (United States)
Publication Date:
OSTI Identifier:
20216447
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 61; Journal Issue: 10; Other Information: PBD: 15 May 2000; Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; COSMOLOGICAL MODELS; NUCLEOSYNTHESIS; RED SHIFT; ELEMENT ABUNDANCE; THEORETICAL DATA

Citation Formats

Kaplinghat, M., Steigman, G., Department of Astronomy, The Ohio State University, Columbus, Ohio 43210, and Walker, T. P. Nucleosynthesis in power-law cosmologies. United States: N. p., 2000. Web. doi:10.1103/PhysRevD.61.103507.
Kaplinghat, M., Steigman, G., Department of Astronomy, The Ohio State University, Columbus, Ohio 43210, & Walker, T. P. Nucleosynthesis in power-law cosmologies. United States. doi:10.1103/PhysRevD.61.103507.
Kaplinghat, M., Steigman, G., Department of Astronomy, The Ohio State University, Columbus, Ohio 43210, and Walker, T. P. Mon . "Nucleosynthesis in power-law cosmologies". United States. doi:10.1103/PhysRevD.61.103507.
@article{osti_20216447,
title = {Nucleosynthesis in power-law cosmologies},
author = {Kaplinghat, M. and Steigman, G. and Department of Astronomy, The Ohio State University, Columbus, Ohio 43210 and Walker, T. P.},
abstractNote = {We have recently considered cosmologies in which the universal scale factor varies as a power of the age of the Universe and concluded that they cannot satisfy the observational constraints on the present age, the magnitude-redshift relation for SN Ia, and the primordial element (D, {sup 3}He, {sup 4}He, and {sup 7}Li) abundances. This claim has been challenged in a proposal that suggested a high baryon density model ({omega}{sub B}h{sup 2}{approx_equal}0.3) with an expansion factor varying linearly with time could be consistent with the observed abundance of primordial helium-4, while satisfying the age and magnitude-redshift constraints. In this paper we further explore primordial nucleosynthesis in generic power-law cosmologies, including the linear case, concluding that models selected to satisfy the other observational constraints are incapable of accounting for all the light element abundances. (c) 2000 The American Physical Society.},
doi = {10.1103/PhysRevD.61.103507},
journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 10,
volume = 61,
place = {United States},
year = {2000},
month = {5}
}