| 棒对星系核区恒星形成活动的影响 |
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| 引用本文： | 汪潋.棒对星系核区恒星形成活动的影响[J].天文学报,2009,50(4). |
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| 作者姓名： | 汪潋 |
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| 作者单位： | 南京大学天文系,南京,210093 |
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| 摘 要： | 利用SDSS光谱,研究了IRAS卫星亮红外源星表中的盘状星系中的恒星形成性质,并着重探讨了棒对星系核区恒星形成活动的影响.利用星族合成的方法得到了每个样本星系核区的恒星组成性质、恒星形成活动的强度等信息,并比较了星系整体和核区恒星形成性质的差异.得到的结论:除去相互作用,样本中的棒星系显示出比非棒旋星系更强的核区恒星形成活动和更多的年轻星族成分.
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| 关 键 词： | 星系 旋涡 恒星 形成 星系 结构 星系 统计 |
The Effect of Bar on Nuclear Star-forming Activities in Nearby Spiral Galaxies |
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| WANG Lian.The Effect of Bar on Nuclear Star-forming Activities in Nearby Spiral Galaxies[J].Acta Astronomica Sinica,2009,50(4). |
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| Authors: | WANG Lian |
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| Abstract: | By using SDSS spectra, we have studied nuclear star-forming properties of nearby spiral galaxies selected from Infrared Revised Bright Galaxy Sample, and try to find the effect of bar structure on star-forming activities in the nuclear regions of nearby galaxies. The composition of stellar population and the strength of star formation activities in the sample galaxies are acquired by using stellar population synthesis code ?STARLIGHT, and the star formation properties in nuclear regions are compared with that of the whole galaxies. We find that the star formation in barred spiral galaxies is more intensive than non-barred ones and barred spirals show much younger stellar populations. |
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| Keywords: | Galaxies:Spiral Stars:Formation Galaxies:Structure Galaxies:Statistics |
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