Brief Note: Analytical Fit to the Luminosity Distance for Flat Cosmologies with a Cosmological Constant

Details Brief Note: Analytical Fit to the Luminosity Distance for Flat Cosmologies with a Cosmological Constant Brief Note: Analytical Fit to the Luminosity Distance for Flat Cosmologies with a Cosmological Constant

1999-04-13

arxiv.org/abs/astro-ph/9904172v1

Astron.Astrophys.Suppl.Ser.120:49,1996

Astronomy and Astrophysics

Astrophysics

9 pages, full postscript paper available at http://www.cita.utoronto.ca/~pen/download/dlum.ps.gz

Scientific paper

10.1086/313167

We present a fitting formula for the luminosity and angular diameter
distances in cosmological models with pressureless matter, a cosmological
constant and zero spatial curvature. The formula has a relative error of less
than 0.4% for 0.2<\Omega_0<1 for any redshift, and a global relative error of
less than 4% for any choice of parameters.

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