Escaping from modified Newtonian dynamics
Escaping from modified Newtonian dynamics
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DOI：
10.1111/j.1745-3933.2007.00308.x
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发表时间：
2007-02
影响因子：
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通讯作者：
B. Famaey;Jean-Philippe Bruneton;HongSheng Zhao
中科院分区：
文献类型：
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作者：
B. Famaey;Jean-Philippe Bruneton;HongSheng Zhao
我们提出了一种新的基于太阳附近逃逸速度的修正牛顿动力学(MOND)银河系尺度上的检验。这项测试独立于MOND在再现星系自转曲线现象学方面的其他经验成功。MOND中的银河系逃逸速度完全由银河系的重子含量及其所在的外场决定。我们估计，要产生观测到的�550kms1的局部逃逸速度，必须嵌入银河系的外场约为a0/100，其中a0是重力在其下被提升的划分加速度标度。这与实际作用在银河系上的外部引力场是相容的。
We present a new test of modified Newtonian dynamics (MOND) on galactic scales, based on the escape speed in the Solar Neighbourhood. This test is independent from other empirical successes of MOND at reproducing the phenomenology of galactic rotation curves. The galactic escape speed in MOND is entirely determined by the baryonic content of the Galaxy and the external field in which it is embedded. We estimate that the external field in which the Milky Way must be embedded to produce the observed local escape speed of � 550 kms 1 is of the order of a0/100, where a0 is the dividing acceleration scale below which gravity is boosted in MOND. This is compatible with the external gravitational field actually acting on the Milky Way.