Necessity of Dark Matter in Modified Newtonian Dynamics within Galactic Scales? - Testing the Covariant MOND in Elliptical Lenses
Modified Newtonian Dynamics (MOND) and its relativistic version TeVeS offer us an alternative perspective to understand the universe without the de mand of the elusive cold dark matter. This MONDian paradigm is not only competitive with the conventional CDM in a large range of scales, but also even more successful in the galactic scale. Recently, by studying 6 lensing systems, Ferreras et al. (2008) claimed that MOND still needs dark matter even in galactic scales. When we study the same systems, however, we yield an opposite conclusion. In this contribution, we report our result and conclude that MOND does not need dark matter in galactic lensing systems. Furthermore, we extend our study to 22 SLACS (Sloan Lens ACS Survey) lenses, and obtain the same conclusion as well, i.e., no dark matter is needed.
Gravitational lensing MOND - dark matter - gravitation - relativity
M.C. Chiu Y. Tian C.M. Ko
Institute of Astronomy, National Central University, Taiwan Department of Physics, National Central University, Taiwan lnstitute of Astronomy, Department of Physics and Center of Complex System, National Central Univers
国际会议
The 10th Asian-Pacific Regional International Astronomical Union Meeting(第十届亚洲及太平洋地区天文学大会 APRIM)
昆明
英文
310-311
2008-08-03（万方平台首次上网日期，不代表论文的发表时间）