THE OUTER ROTATION CURVE OF THE MILKY WAY
THE OUTER ROTATION CURVE OF THE MILKY WAY
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DOI：
10.1093/mnras/287.1.l5
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发表时间：
1996-12
影响因子：
4.8
通讯作者：
J. Binney;W. Dehnen
中科院分区：
文献类型：
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作者：
J. Binney;W. Dehnen
对银河系圆周速度曲线vc（R）的直接测定表明，在太阳附近，vc开始随R近似线性上升。如果这个结果是正确的，那么银河系的质量密度在R ~> R 0时就与半径无关了。我们表明，如果真实的圆周速度曲线近似为常数或在R 0 1.25处缓慢下降，则v_c的表观线性上升会自然出现。R 0实际上集中在半径为~1.6 R 0的环中。
A straightforward determination of the circular-speed curve vc(R) of the Milky Way suggests that near the Sun, vc starts to rise approximately linearly with R. If this result were correct, the Galactic mass density would have to be independent of radius at R ~> R0. We show that the apparent linear rise in v_c arises naturally if the true circular-speed curve is about constant or gently falling at R0 1.25 R0 are actually concentrated into a ring of radius ~1.6 R0.