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Eur Phys J C Part Fields. 2018;78(4):308. doi: 10.1140/epjc/s10052-018-5792-2. Epub 2018 Apr 18.

Galaxy rotation curves via conformal factors.

Author information

1
1West University of Timişoara, V. Pârvan Ave. 4, 300223 Timisoara, Romania.
2
Institute for Theoretical Physics, pl. M. Borna 9, 50-204 Wroclaw, Poland.
3
3Institute of Physics, Maria Curie-Sklodowska University, pl.Marii Curie-Sklodowskiej 1, 20-031 Lublin, Poland.

Abstract

We propose a new formula to explain circular velocity profiles of spiral galaxies obtained from the Starobinsky model in the Palatini formalism. It is based on the assumption that the gravity can be described by two conformally related metrics: one of them is responsible for the measurement of distances, while the other, the so-called dark metric, is responsible for a geodesic equation and therefore can be used for the description of the velocity profile. The formula is tested against a subset of galaxies taken from the HI Nearby Galaxy Survey (THINGS).

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