Publication Date:
2011-08-18
Description:
Theoretical prejudices argue strongly for a flat universe; however, observations do not support this view. It is pointed out that this apparent conflict could be resolved if the mass density of the universe today were dominated by (1) relativistic particles produced by the recent decay of massive, relic particle species, or by (2) a relic cosmological constant. Scenario (1) has several advantages in the context of galaxy formation, but must confront the problem of a young universe.
Keywords:
ASTROPHYSICS
Type:
Physical Review Letters (ISSN 0031-9007); 52; 2090-209
Format:
text