甚小阵列数据双谱的估算
天体物理学
2007-05-23 v2
摘要
我们估算了2002年12月发布的甚小阵列紧凑型和扩展型配置观测数据的双谱，并将我们的结果与从高斯模拟中获得的结果进行了比较。对于两个单独的场，存在轻微的大双谱值过剩，但当这些场合并时，这种过剩并未出现。考虑到我们预期的残余点源水平，我们不认为这些是差异的来源。利用紧凑型配置数据，我们将非线性耦合参数f_NL的值在95%置信度上限定为5400。我们使用具有已知双谱的非高斯模拟测试了我们的双谱估计器，并恢复了输入值。
引用
@article{arxiv.astro-ph/0401618,
title = {Estimating the bispectrum of the Very Small Array data},
author = {Sarah Smith and Graca Rocha and Anthony Challinor and Richard A. Battye and Pedro Carreira and Kieran Cleary and Rod D. Davies and Richard J. Davis and Clive Dickinson and Ricardo Genova-Santos and Keith Grainge and Carlos M. Gutierrez and Yaser A. Hafez and Michael P. Hobson and Michael E. Jones and Rudiger Kneissl and Katy Lancaster and Anthony Lasenby and J. P. Leahy and Klaus Maisinger and Guy G. Pooley and Nutan Rajguru and Rafael Rebolo and Jose Alberto Rubino-Martin and Pedro Sosa Molina and Richard D. E. Saunders and Richard S. Savage and Paul Scott and Anze Slosar and Angela C. Taylor and David Titterington and Elizabeth Waldram and Robert A. Watson},
journal= {arXiv preprint arXiv:astro-ph/0401618},
year = {2007}
}
备注
17 pages, 16 figures, replaced with version accepted by MNRAS. Primordial bispectrum recalculated and figure 11 changed