On the Newtonian Cosmology Equations with Pressure

Details On the Newtonian Cosmology Equations with Pressure On the Newtonian Cosmology Equations with Pressure

1996-12-17

arxiv.org/abs/astro-ph/9612166v1

Mon.Not.Roy.Astron.Soc. 291 (1997) L1-L4

Astronomy and Astrophysics

Astrophysics

9 pages, uses LATEX

Scientific paper

The basic equations describing a Newtonian universe with uniform pressure are reexamined. We argue that in the semi-classical formulation adopted in the literature the continuity equation has a misleading pressure gradient term. When this term is removed, the resulting equations give the same homogeneous background solutions with pressure and the same evolution equation for the density contrast as are obtained using the full relativistic approach.

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