Astrophysics, abstract
astro-ph/0603637

From: Charles Hellaby [view email]

Date (v1): Thu, 23 Mar 2006 13:53:55 GMT (86kb)
Date (revised v2): Wed, 17 May 2006 12:50:09 GMT (87kb)

The Mass of the Cosmos

Authors: Charles Hellaby

Comments: REVTeX, 6 pages, 9 graphs in 3 figures. Replacement has very minor changes: puts greek letters on graphs, and adds small corrections made in publication

Report-no: uct-cosmology-2006-03-23

We point out that the mass of the cosmos on gigaparsec scales can be measured, owing to the unique geometric role of the maximum in the areal radius. Unlike all other points on the past null cone, this maximum has an associated mass, which can be calculated with very few assumptions about the cosmological model, providing a measurable characteristic of our cosmos. In combination with luminosities and source counts, it gives the bulk mass to light ratio. The maximum is particularly sensitive to the values of the bulk cosmological parameters. In addition, it provides a key reference point in attempts to connect cosmic geometry with observations. We recommend the determination of the distance and redshift of this maximum be explicitly included in the scientific goals of the next generation of reshift surveys. The maximum in the redshift space density provides a secondary large scale characteristic of the cosmos.

http://arxiv.org/abs/astro-ph/0603637