利用引力波观测确认或排除暗物质模拟器存在的决定性测试
A Decisive test to confirm or rule out the existence of dark matter emulators using gravitational wave observations
摘要：
我们考虑稳定的修改后的引力理论，再现银河系的旋转曲线和观测到的弱透镜量没有暗物质。在任何这样的模型中，重力波遵循的测地线都不同于其他无质量粒子的测地线。对于我们称之为“暗物质模拟器”的一类特定模型，在宇宙学距离上，这导致了来自某些宇宙事件的重力波脉冲与光子或中微子脉冲的到达时间之间的容易检测和差异。对于SN 1987 a（发生在大麦云云）的重复，时间滞后在几天的范围内。对于最近的伽马射线暴，GRB 070201（似乎发生在仙女座星系的边缘），时间滞后将在两年左右。
英文摘要：
We consider stable modified theories of gravity that reproduce galactic rotation curves and the observed amount of weak lensing without dark matter. In any such model gravity waves follow a different geodesic from that of other massless particles. For a specific class of models which we call "dark matter emulators," over cosmological distances this results in an easily detectable and difference between the arrival times of the pulse of gravity waves from some cosmic event and those of photons or neutrinos. For a repeat of SN 1987a (which took place in the Large Magellanic Cloud) the time lag is in the range of days. For the recent gamma ray burst, GRB 070201 (which seems to have taken place on the edge of the Andromeda galaxy) the time lag would be in the range of about two years.
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