| 盘星系的内禀扁度研究 |
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| 引用本文： | 袁启荣,朱朝曦.盘星系的内禀扁度研究[J].天文学报,2003,44(4):342-349. |
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| 作者姓名： | 袁启荣 朱朝曦 |
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| 作者单位： | 南京师范大学物理科学与技术学院,南京,210097 |
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| 基金项目： | 国家自然科学基金(10273007,19873018)，973(TG1999075402)资助项目 |
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| 摘 要： | 盘星系的内禀扁度对计算星系的空间倾角非常重要．对从LEDA数据库中选取的14988个盘星系进行内禀扁度的统计分析．研究表明，盘星系的内禀扁度与星系的形态密切相关．整体上说，透镜星系和不规则星系的内禀扁度qo大于旋涡星系，早型旋涡星系的内禀扁度qo大于晚型旋涡星系，其中Scd星系的内禀扁度qo最小．利用所得的qo-T关系，还对16个已知倾角的亮星系进行了倾角计算，发现与其他方法估计的空间倾角符合得较好．
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| 关 键 词： | 盘星系 内禀扁度 透镜星系 不规则星系 亮星系 倾角 测光 |
| 修稿时间： | 2003年2月18日 |
A Study on Intrinsic Flatness of the Disk Galaxies |
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| YUAN Qi-Rong ZHU Chao-Xi.A Study on Intrinsic Flatness of the Disk Galaxies[J].Acta Astronomica Sinica,2003,44(4):342-349. |
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| Authors: | YUAN Qi-Rong ZHU Chao-Xi |
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| Abstract: | The intrinsic flatness of the disk galaxies is very important to calculate the spatial inclinations of galaxies. The statistical analysis on 14,988 disk galaxies taken from the LEDA database shows that the intrinsic flatness is closely related to galactic morphology. In general, the intrinsic axis ratios gofor the lenticular and irregular galaxies are larger than those of the spirals, and the early-type spirals have a larger go than the late-types. The Scd galaxies are found to have the minimum q0. Based on the newly generated q0-T relation, the inclinations for 16 bright galaxies with known inclinations are calculated, and the values are consistent with the inclinations derived by other methods. |
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| Keywords: | galaxies: general galaxies: structure galaxies: photometry |
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