Journal Article

An analytical approach for the determination of the luminosity distance in a flat universe with dark energy

T. Wickramasinghe and T. N. Ukwatta

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 406, issue 1, pages 548-550
Published in print July 2010 | ISSN: 0035-8711
Published online July 2010 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2010.16686.x
An analytical approach for the determination of the luminosity distance in a flat universe with dark energy

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Recent cosmological observations indicate that the present universe is flat and dark energy dominated. In such a universe, the calculation of the luminosity distance, dL, involves repeated numerical calculations. In this paper, it is shown that a quite efficient approximate analytical expression, having very small uncertainties, can be obtained for dL. The analytical calculation is shown to be exceedingly efficient, as compared to the traditional numerical methods, and is potentially useful for Monte Carlo simulations involving luminosity distances.

Keywords: distance scale

Journal Article.  905 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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