Vol 21, No 12

Observational scalings testing modified gravity

Armine Amekhyan, Seda Sargsyan, Arman Stepanian


Abstract We consider different observational effects to test a modified gravity approach involving the cosmological constant in the common description of dark matter and dark energy. We obtain upper limits for the cosmological constant by studying the scaling relations for 12 nearby galaxy clusters, the radiated power from gravitational waves and the Tully-Fisher relation for super spiral galaxies. Our estimations reveal that, for all these cases, the upper limits for Λ are consistent with its actual value predicted by cosmological observations.


Keywords Cosmology: dark energy — Cosmology: dark matter — Galaxies: clusters: general — Galaxies: general

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