来自 2dF 星系红移测量的总中子星质量新上限
天体物理学
2009-07-09 v3 高能物理 - 唯象学
摘要
我们通过将来自 2dF 星系红移测量得到的涨落功率谱与包含四种成分（质子、冷暗物质、巨型中子星和宇宙常数）的功率谱进行比较，来约束 f_nu = Omega_nu / Omega_m，即中子星对宇宙总质量密度的比例贡献。加入来自独立宇宙学探针的约束，我们发现 f_nu < 0.13（置信区间为95%），假设标量谱指数 n=1时， prior 为 0.1< Omega_m <0.5。这转化为对总中子星质量的上限 m_nu,tot < 1.8 eV，对于“一致”Omega_m 和哈勃常数的取值。非常相似的结果通过对Omega_m进行类型Ia超新星测量 survey 的 prior，以及对 n 进行边际化获得。
引用
@article{arxiv.astro-ph/0204152,
title = {A new upper limit on the total neutrino mass from the 2dF Galaxy Redshift Survey},
author = {O. Elgaroy and O. Lahav and W. J. Percival and J. A. Peacock and D. S. Madgwick and S. L. Bridle and C. M. Baugh and I. K. Baldry and J. Bland-Hawthorn and T. Bridges and R. Cannon and S. Cole and M. Colless and C. Collins and W. Couch and G. Dalton and R. De Propris and S. P. Driver and G. P. Efstathiou and R. S. Ellis and C. S. Frenk and K. Glazebrook and C. Jackson and I. Lewis and S. Lumsden and S. Maddox and P. Norberg and B. A. Peterson and W. Sutherland and K. Taylor},
journal= {arXiv preprint arXiv:astro-ph/0204152},
year = {2009}
}
备注
5 pages, 3 figures, version accepted for publication in PRL. Slightly extended discussion of the choice of priors