Gauge choice and geodetic deflection in conformal gravity

被引:34
|
作者
Edery, A
Méthot, AA
Paranjape, MB
机构
[1] McGill Univ, Dept Phys, Ctr High Energy Phys, Montreal, PQ H3A 2T8, Canada
[2] Univ Montreal, Dept Phys, Grp Phys Particules, Montreal, PQ H3C 3J7, Canada
[3] Natl Tsing Hua Univ, Dept Phys, Natl Ctr Theoret Sci, Hsinchu 300, Taiwan
关键词
Weyl gravity; particle motion;
D O I
10.1023/A:1013011312648
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Conformal gravity has been proposed as an alternative theory of gravity which can account for flat galactic rotation curves without recourse to copious quantities of dark matter. However it was shown that for the usual choice of the metric, the result is catastrophic for null or highly relativistic geodesics, the effect is exactly the opposite yielding an effective repulsion and less deflection in this case. It is the point of this paper, that any result for massive geodesics depends on the choice of conformal gauge, in contradistinction to the case of null geodesics. We show how it is possible to choose the gauge so that the theory is attractive for all geodesics.
引用
收藏
页码:2075 / 2079
页数:5
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