|
Scalar–tensor–vector gravity (STVG)〔 〕 is a modified theory of gravity developed by John Moffat, a researcher at the Perimeter Institute for Theoretical Physics in Waterloo, Ontario. The theory is also often referred to by the acronym MOG (''MO''dified ''G''ravity). ==Overview== Scalar–tensor–vector gravity theory,〔 〕 also known as MOdified Gravity (MOG), is based on an action principle and postulates the existence of a vector field, while elevating the three constants of the theory to scalar fields. In the weak-field approximation, STVG produces a Yukawa-like modification of the gravitational force due to a point source. Intuitively, this result can be described as follows: far from a source gravity is stronger than the Newtonian prediction, but at shorter distances, it is counteracted by a repulsive fifth force due to the vector field. STVG has been used successfully to explain galaxy rotation curves,〔 〕 the mass profiles of galaxy clusters,〔 〕 gravitational lensing in the Bullet Cluster,〔 〕 and cosmological observations〔 〕 without the need for dark matter. On a smaller scale, in the Solar System, STVG predicts no observable deviation from general relativity.〔 〕 The theory may also offer an explanation for the origin of inertia.〔 〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Scalar–tensor–vector gravity」の詳細全文を読む スポンサード リンク
|