使用 Type Ia 超新星作为时钟观测宇宙时间膨胀
天体物理学
2007-05-23 v1
摘要
本工作基于系统性搜索高红移 Type Ia 超新星的首批结果。使用 R 波段滤波器，我们发现了七颗红移 z=0.3~0.5 的超新星，均在巅峰光度前或恰好在巅峰时被发现。Type Ia 超新星已知在第一阶近似下为同质性的超新星群，具有非常相似的光度曲线、光谱和峰值亮度。本文报告称，我们观察到的光度曲线均呈现所需的 1+z 膨胀时间延拓。小的偏差可归因于近距离超新星 (z<0.1) 所观察到的宽度-亮度相关。我们在本文中展示了宇宙时间膨胀的首次明确观测。
关键词
引用
@article{arxiv.astro-ph/9602124,
title = {Observation of Cosmological Time Dilation using Type Ia Supernovae as Clocks},
author = {G. Goldhaber and S. Deustua and S. Gabi and D. Groom and I. Hook and A. Kim and M. Kim and J. Lee and R. Pain and C. Pennypacker and S. Perlmutter and I. Small and A. Goobar and R. Ellis and K. Glazebrook and R. McMahon and B. Boyle and P. Bunclark and D. Carter and M. Irwin and H. Newberg and A. V. Filippenko and T. Matheson and M. Dopita and J. Mould and W. Couch},
journal= {arXiv preprint arXiv:astro-ph/9602124},
year = {2007}
}
备注
8 pages, 3 Postscript figures, uuencoded uses crckapb.sty and psfig.sty. To appear in Thermonuclear Supernovae (NATO ASI), eds. R. Canal, P. Ruiz-LaPuente, and J. Isern. Postscript version is also available at http://www-supernova.lbl.gov/