Power-law cosmology, SN Ia, and BAO

Journal Article · Wed Oct 01 00:00:00 EDT 2014 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2014/10/047· OSTI ID:22375809

Dolgov, Aleksander ^[1]; Halenka, Vitali; Tkachev, Igor ^[2]

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1. Laboratory of Cosmology and Elementary Particles, Novosibirsk State University, Pirogov street 2, 630090 Novosibirsk (Russian Federation)
2. Institute for Nuclear Research of the Russian Academy of Sciences, prospekt 60-letiya Oktyabrya 7a, Moscow 117312 (Russian Federation)

We revise observational constraints on the class of models of modified gravity which at low redshifts lead to a power-law cosmology. To this end we use available public data on Supernova Ia and on baryon acoustic oscillations. We show that the expansion regime a(t) ∼ t{sup β} with β close to 3/2 in a spatially flat universe is a good fit to these data.

• OSTI ID: 22375809
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2014, Issue 10; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
BARIUM OXIDES
COSMOLOGY
EXPANSION
GRAVITATION
LIMITING VALUES
RED SHIFT
UNIVERSE