中文

引力透镜红移分布的宇宙学参数

天体物理学 2011-05-23 v2

摘要

对于已知的引力透镜系统,透镜的红移分布与理论预期进行比较,后者覆盖超过10410^{4}套弗里德曼-莱梅特里宇宙学模型,足以覆盖可能的情况。该比较用于为每个模型分配相对概率。该程序针对不同的不均匀性参数η\eta和限制性光谱 magnitudes~mlimm_{\rm lim}进行了多次重复,后者对于选择效应至关重要。对于λ0=0\lambda_{0}=0k=0k=0的特殊情况,我们更详细地考察了这两个参数的依赖性。确认了以前的结果,即该方法是~λ0\lambda_{0}Ω0\Omega_{0}更好的探针,但它看起来低概率的模型(即具有较大~λ0\lambda_{0}值)是由于选择效应所致。该方法的判别力当然可以随着发现更多引力透镜系统而提高。然而,我们的数值模拟表明,观察到的合理数量的系统无法对宇宙学参数提供有趣的约束。

关键词

引用

@article{arxiv.astro-ph/9501013,
  title  = {Cosmological parameters and the redshift distribution of gravitational lenses},
  author = {Phillip Helbig and Rainer Kayser},
  journal= {arXiv preprint arXiv:astro-ph/9501013},
  year   = {2011}
}

备注

One self-unpacking uuencoded compressed PostScript file (created with uufiles) containing the complete text with all figures included (here 140kb gzipped, unpacked 975kb). 10 pages. Should be printable without loss on US-size paper. Paper version available on request. Changes--nothing removed, typos corrected, the following additions: one figure, one table and some text explaining the structure in the plots in more detail; more detailed explanation of the statistics used. Accepted by Astronomy and Astrophysics