| 超新星在宇宙学中的应用 |
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| 引用本文： | 王晓峰,李宗伟. 超新星在宇宙学中的应用[J]. 天文学进展, 2000, 18(2): 159-171 |
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| 作者姓名： | 王晓峰 李宗伟 |
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| 作者单位： | 北京师范大学天文系北京 100875 |
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| 基金项目： | 国家自然科学基金重点项目（19733002） |
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| 摘 要： | 对Ｉａ超新星在宇宙学中的应用作了述评。蓝Ｉａ超新星具有相对均匀的光谱、光变曲线及峰值光度，是较好的相对距离指示器。利用峰值光度同光变曲线形状或其它与距离无关的可观测量的关系可进一步将Ｉａ超新星校准成精确的距离指示器。一旦它们的绝对光度得到标定，就可以定出哈勃常数Ｈ０。基于对邻近星系Ｉａ超新星的理解，高红移Ｉａ超新星的数据可对宇宙密度参数ΩＭ、ΩＶ及减速因子ｑ０作出限制，并对膨胀宇宙的最终命运作出判
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| 关 键 词： | Ia超新星 蓝Ia超新星 宇宙学 宇宙学参数 |
| 修稿时间： | 1999-11-17 |
Application of Type Ia Supernovae to Cosmology |
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| Wang Xiaofeng,LI Zongwei. Application of Type Ia Supernovae to Cosmology[J]. Progress In Astronomy, 2000, 18(2): 159-171 |
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| Authors: | Wang Xiaofeng LI Zongwei |
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| Affiliation: | Department of Astronomy Beijing Normal University Beijing 100875 |
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| Abstract: | The application of Type Ia supernovae to cosmology has been briefly reviewed. Blue SNe Iaare better distance indicators, with relatively uniform spectra, light curves, and peak luminosity.The dispersion of SN Ia's peak luminosity could be further reduced via an empirical correlationof the peak luminosity with the light curve shapes. Once the absolute luminosity of SNe Ia isdetermined, we can get the value of the Hubble parameter. The data ofhigh--redshift SNe Ia couldmake constraints on the cosmic density parameters ΩM, ΩΛ as well as the deceleration factor q0,and hence determining the ultimate fate of our universe. |
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| Keywords: | SNe Ia blue SNe Ia---cosmologycosmological parameters---distance seale |
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