| 晚型旋涡星系盘的颜色梯度与结构参数的相关关系 |
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| 引用本文： | 李化南,郑晓光.晚型旋涡星系盘的颜色梯度与结构参数的相关关系[J].天文学报,2011,52(1):16-24. |
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| 作者姓名： | 李化南 郑晓光 |
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| 作者单位： | 吉林师范大学物理学院,四平,136000 |
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| 摘 要： | 从Sloan数字巡天第2批释放的数据(SDSS DR2)中选择了395个在r波段亮于15等的面向晚型旋涡星系作为样本,研究了盘的颜色梯度与结构参数的关系.结果表明:盘的颜色梯度与盘的绝对星等(质量)无关;盘的颜色梯度与盘的尺度有关,越大的盘颜色梯度越陡;盘的颜色梯度与盘的颜色有关,越蓝的盘颜色梯度越陡;盘的颜色梯度与盘的表面亮度有关,越亮的盘颜色梯度越陡,并简单讨论了盘的颜色梯度与各结构参数的相关关系对晚型旋涡星系盘恒星形成历史的约束.
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| 关 键 词： | 星系:旋涡 星系:基本参数 |
Correlations between Color Gradients and Structural Parameters of the Disks in Late-type Spiral Galaxies |
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| LI Hua-nan,ZHENG Xiao-guang.Correlations between Color Gradients and Structural Parameters of the Disks in Late-type Spiral Galaxies[J].Acta Astronomica Sinica,2011,52(1):16-24. |
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| Authors: | LI Hua-nan ZHENG Xiao-guang |
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| Institution: | LI Hua-nan ZHENG Xiao-guang (College of Physics,Jilin Normal University,Siping 136000) |
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| Abstract: | Prom Data Release Two of Sloan Digital Sky Survey(SDSS DR2),395 late-type spiral galaxies brighter than 15~m in r band are selected.The correlations between the color gradients and other structural parameters of disks are investigated.It is shown that there is no correlation between the color gradients and absolute magnitude(mass);there are strong correlations between the color gradients and sizes of the disks,i.e.,the larger the disks,the steeper the color gradients.There are also strong correlations betwe... |
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| Keywords: | galaxies spiral fundamental parameters |
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