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arXiv 0806.0496astro-ph
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用超新星探测暗能量的不均匀性

Probing Dark Energy Inhomogeneities with Supernovae

Michael Blomqvist, Edvard Mortsell, Serena Nobili

摘要:

我们讨论的可能性,以确定各向异性和/或不均匀的宇宙模型使用Ia型超新星的数据。在大范围的角尺度上搜索电流Ia型峰值幅度的相关性产生零结果。然而,同样的分析仅限于低红移的超新星,在大约40度的角标度下,在2 σ水平上显示出微弱的π关系。即将到来的数据,例如,SNLS(超新星遗留巡天)和SDSS-II(SDSS:斯隆数字巡天)超新星搜索将在不久的将来改善我们对可能的相关性的大小限制--或者可能检测到--在高红移的百分比水平上。利用建议的SNAP(超新星加速探测器)卫星的数据,我们将能够在小于一度的尺度上检测到Ia型峰值幅度上的引力透镜引起的相关性。

英文摘要:

We discuss the possibility to identify anisotropic and/or inhomogeneous cosmological models using type Ia supernova data. A search for correlations in current type Ia peak magnitudes over a large range of angular scales yields a null result. However, the same analysis limited to supernovae at low redshift, shows a feeble anticorrelation at the two sigma level at angular scales of about 40 degrees. Upcoming data from, e.g., the SNLS (Supernova Legacy Survey) and the SDSS-II (SDSS: Sloan Digital Sky Survey) supernova searches will improve our limits on the size of - or possibly detect - possible correlations also at high redshift at the per cent level in the near future. With data from the proposed SNAP (SuperNova Acceleration Probe) satellite, we will be able to detect the induced correlations from gravitational lensing on type Ia peak magnitudes on scales less than a degree.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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