THE MORPHOLOGICAL-DEPENDENT TULLY–FISHER RELATION OF SPIRAL GALAXIES
THE MORPHOLOGICAL-DEPENDENT TULLY–FISHER RELATION OF SPIRAL GALAXIES
复制标题
螺旋星系形态相关的塔利-费希尔关系
DOI：
10.1088/0004-637x/705/2/1496
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
C. Shu
中科院分区：
文献类型：
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作者：
S. Shen;Caihong Wang;R. Chang;Z. Shao;J. Hou;C. Shu
旋涡星系的Tully-Fisher关系明显地依赖于形态类型，在固定的最大自转速度Vmax时，较早类型的旋涡星系具有系统较低的光度。这种光度的降低在波长较短的情况下更为明显。通过模拟不同形态类型旋涡星系的自转曲线和恒星群，我们发现旋涡星系的Vmax弱依赖于形态类型，而起源于凸起-盘组成效应的恒星群的差异主要解释了Tully-Fisher关系的形态类型依赖性。
The Tully–Fisher relation of spiral galaxies shows notable dependence on morphological types, with earlier type spirals having systematically lower luminosity at fixed maximum rotation velocity Vmax. This decrement of luminosity is more significant in shorter wavelengths. By modeling the rotation curve and stellar population of different morphological-type spiral galaxies in combination, we find that the Vmax of spiral galaxies is weakly dependent on the morphological type, whereas the difference of the stellar population originating from the bulge–disk composition effect mainly account for the morphological type dependence of the Tully–Fisher relation.