A New Proposal for Galactic Dark Matter: Effect of f(T) Gravity
It is still a challenging problem to the theoretical physicists to know the exact nature of the galactic dark matter which causes the galactic rotational velocity to be more or less a constant. We have proposed that the dark matter as an effect of f(T) gravity. Assuming the flat rotation curves as input we have shown that f(T) gravity can explain galactic dynamics. Here, we don’t have to introduce dark matter. Spacetime metric inspired by f(T) gravity describes the region up to which the tangential velocity of the test particle is constant. This inherent property appears to be enough to produce stable circular orbits as well as attractive gravity.
KeywordsGalactic dark matter f(T) gravity Rotational velocity
R. Biswas thanks ISRO grant “ISRO/RES/2/367/10-11” for providing Research Associate Fellowship. F. Rahaman gratefully acknowledge support from IUCAA, Pune, India under Visiting Associateship under which a part of this work was carried out. F. Rahaman is also thankful to PURSE, DST and UGC, Govt. of India for providing financial support.
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