| The Effect of Method of Constructing the Mass Distribution on Single Stellar Populations |
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| 作者姓名： | Feng-Hui Zhang Li-Fang Li and Zhan-Wen Han National Astronomical Observatories Yunnan Observatory Chinese Academy of Sciences Kunming |
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| 作者单位： | Feng-Hui Zhang，Li-Fang Li and Zhan-Wen Han National Astronomical Observatories，Yunnan Observatory，Chinese Academy of Sciences，Kunming 650011 |
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| 基金项目： | Supported by the National Natural Science Foundation of China. |
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| 摘 要： | We use two methods of constructing the initial mass distribution, the traditional way and Monte Carlo simulation, to obtain integrated U - B, B - V, V-R and V-I colours and absorption-line indices denned by the Lick Observatory image dissector scanner (referred to as Lick/IDS), for instantaneous burst solarmetallicity single stellar populations with ages in the range 1-15 Gyr. We find that the evolutionary curves of all colours obtained by the traditional method are smoother than those by Monte Carlo simulation, that the U - B and B - V colours obtained by the two methods agree with one another, while the V - R and V - I colours by the traditional method are bluer than those by Monte Carlo simulation. A comparison of the Lick/IDS absorption-line indices shows that the variations in all the indices by the traditional method are smoother than that for the Monte Carlo simulation, and that all the indices except for TiO1 and TiO2 are consistent with those for the Monte Carlo simulation.
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| 关 键 词： | 恒星物理学 动力学 银河系 空间分布 |
The Effect of Method of Constructing the Mass Distribution on Single Stellar Populations |
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| Feng-Hui Zhang,Li-Fang Li and Zhan-Wen Han National Astronomical Observatories,Yunnan Observatory,Chinese Academy of Sciences,Kunming .The Effect of Method of Constructing the Mass Distribution on Single Stellar Populations[J].Chinese Journal of Astronomy and Astrophysics,2005,5(4):371-378. |
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| Authors: | Feng-Hui Zhang Li-Fang Li Zhan-Wen Han |
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| Institution: | National Astronomical Observatories, Yunnan Observatory, Chinese Academy of Sciences,Kunming 650011 |
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| Abstract: | We use two methods of constructing the initial mass distribution, the traditional way and Monte Carlo simulation, to obtain integrated U - B, B - V, V-R and V-I colours and absorption-line indices denned by the Lick Observatory image dissector scanner (referred to as Lick/IDS), for instantaneous burst solarmetallicity single stellar populations with ages in the range 1-15 Gyr. We find that the evolutionary curves of all colours obtained by the traditional method are smoother than those by Monte Carlo simulation, that the U - B and B - V colours obtained by the two methods agree with one another, while the V - R and V - I colours by the traditional method are bluer than those by Monte Carlo simulation. A comparison of the Lick/IDS absorption-line indices shows that the variations in all the indices by the traditional method are smoother than that for the Monte Carlo simulation, and that all the indices except for TiO1 and TiO2 are consistent with those for the Monte Carlo simulation. |
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| Keywords: | star: evolution-galaxies: star clusters-galaxies: stellar content |
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