Journal
ASTROPHYSICAL JOURNAL
Volume 705, Issue 2, Pages 1496-1502Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/705/2/1496
Keywords
galaxies: kinematics and dynamics; galaxies: spiral; galaxies: stellar content
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Funding
- Shanghai Rising-Star Program [08QA14077]
- Shanghai Municipal Science and Technology Commission [04dz_05905]
- [NSFC10803016]
- [NSFC10833005]
- [NKBRSF2007CB815402]
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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 V-max. 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 V-max 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.
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