DOES COSMOLOGICAL STRUCTURE FORMATION REQUIRE DARK ENERGY?

Conference item

Precision measurements of anisotropies in the cosmic microwave background and of the clustering of large-scale structure have supposedly established that the universe is presently dominated by "dark energy" which has negative pressure and behaves similarly to a cosmological constant. This is based on the assumption that the primordial density perturbation has a nearly scale-invariant power-law spectrum and that the dark matter consists of "cold" particles. However there are theoretical and observational indications that the spectrum is not scale-free and it is known that sub-eV mass neutrinos contribute a small component of hot dark matter. This would be sufficient to fit the same observational data without requiring any dark energy. © EAS, EDP Sciences 2009.

Authors: Sarkar, S

• Publication status: Published
• Host title: CRAL-IPNL: DARK ENERGY AND DARK MATTER: OBSERVATIONS, EXPERIMENTS AND THEORIES
• Volume: 36
• Pages: 3-9
• Publication date: 2009-01-01
• DOI: 10.1051/eas/0936001
• EISSN: 1638-1963
• ISSN: 1633-4760
• ISBN: 9782759804399