Galaxy rotation curves via conformal factors

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 dista...

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Veröffentlicht in:	The European physical journal. C, Particles and fields Particles and fields, 2018-04, Vol.78 (4), p.308-7, Article 308
Hauptverfasser:	Sporea, Ciprian A., Borowiec, Andrzej, Wojnar, Aneta
Format:	Artikel
Sprache:	eng
Schlagworte:	Astronomy Astrophysics and Cosmology Elementary Particles Galactic rotation Hadrons Heavy Ions Measurement Science and Instrumentation Nuclear Energy Nuclear Physics Physics Physics and Astronomy Quantum Field Theories Quantum Field Theory Regular - Theoretical Physics Regular Article - Theoretical Physics Spiral galaxies Stars & galaxies String Theory Velocity distribution
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Beschreibung
Zusammenfassung:	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).
ISSN:	1434-6044 1434-6052
DOI:	10.1140/epjc/s10052-018-5792-2