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arXiv 0903.2297astro-ph.COastro-ph.IM
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大口径X射线望远镜的宇宙学研究

Cosmological Studies With A Large-Area X-ray Telescope

A. Vikhlinin, S. W. Allen, M. Arnaud, M. Bautz, H. Boehringer, M. Bonamente, J. Burns, A. Evrard, J. P. Henry, C. Jones, B. R. McNamara, D. Nagai, D. Rapetti, T. Reiprich

摘要:

国际X射线天文台在观测时间上的适度投资,用于研究未来大规模巡天中发现的高红移星系团,将提供具有根本重要性的宇宙学测量。IXO观测与透镜跟踪相结合,将测量z=0-2的扰动增长因子,其精度与JDEM观测宇宙切变和EUCLID观测红移空间畸变的精度相当,甚至可能更好。来自星系团的结构数据的增长将显着提高我们的暗能量状态方程的知识,并将有助于约束宇宙加速的非GR模型。对最大的动态弛豫星系团的IXO观测将提供一个强大的,独立的测量宇宙膨胀历史的表观f_gas(z)趋势。该技术的系统和统计误差与SNIa和BAO研究具有竞争力,使得该测试对于提高LSST和JDEM计划的几何宇宙学测量的准确性和可靠性非常有用。只有采用一系列强有力的、独立的方法,包括这里讨论的方法,才能对宇宙加速的起源这样深刻的问题给出可靠的答案。

英文摘要:

A moderate investment of observing time with the International X-ray Observatory to study high-redshift galaxy clusters detected in future large-scale surveys, will provide cosmological measurements of fundamental importance. IXO observations, combined with lensing follow-up, will measure the perturbation growth factor from z=0-2 with an accuracy comparable to, or possibly better than, that expected from observations of cosmic shear with JDEM, and redshift-space distortions with EUCLID. The growth of structure data derived from clusters will significantly improve our knowledge of the dark energy equation of state and will aid in constraining non-GR models for cosmic acceleration. IXO observations of the largest, dynamically relaxed clusters will provide a powerful, independent measurement of the cosmological expansion history using the apparent f_gas(z) trend. Systematic and statistical errors from this technique are competitive with SNIa and BAO studies, making the test extremely useful for improving the accuracy and reliability of the geometric cosmological measurements planned for LSST and JDEM. Only by employing a range of powerful, independent approaches, including those discussed here, can robust answers to puzzles as profound as the origin of cosmic acceleration be expected.

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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