Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008sf2a.conf..347b&link_type=abstract
"SF2A-2008: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics Eds.: C. Charbonnel, F. Combes
Astronomy and Astrophysics
Astrophysics
Scientific paper
The Standard Model of Cosmology predicts a rather strange composition for the energy content of our Universe: ≈70% of unknown Dark Energy and ≈25% of undetected Dark Matter, whereas ordinary matter accounts for just ≈5%. Although this representation fits rather well cosmological observations, it lacks physical meaning and is therefore unsatisfactory. We study here an alternative universe with equal quantities of matter and antimatter, in which antimatter is supposed to present a negative active gravitational mass, resulting in a coasting Milne cosmology. We present here some characteristics of this symmetric Milne universe and show that it is very surprisingly consistent with Big-Bang Nucleosynthesis, Cosmic Microwave Background and Type Ia Supernovae.
Benoit-Lévy Aurélien
Chardin Gabriel
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