论文标题
具有IA型超新星的特殊速度宇宙学
Peculiar velocity cosmology with type Ia supernovae
论文作者
论文摘要
IA型超新星再次有机会彻底改变宇宙学领域，因为新一代的调查正在获得附近的成千上万的Sneia开放一个新时代的宇宙学：直接测量由$ fd $参数参数的结构增长。该方法基于从残留到哈勃定律中得出的sneia特殊速度，作为由大规模结构引起的全部引力电位的直接示踪剂。通过这种技术，我们不仅可以探究暗能量的特性，还可以探测重力定律。在本文中，我们介绍分析框架和预测。我们表明，到2027年，ZTF和LSST能够以$ fd $的价格达到5 \％的精度。我们的分析对照相的分析并不显着敏感，但是已知的选择功能和光谱红移是必须的。我们最终介绍了一个专用光谱仪的想法，该想法除了提高每个Sneia的效率外，还将获得所有必需的信息，以便我们可以在LSST操作的前两年内达到5 \％的精度，并在调查结束时达到少数百分比的水平。
Type Ia Supernovae have yet again the opportunity to revolutionize the field of cosmology as the new generation of surveys are acquiring thousands of nearby SNeIa opening a new era in cosmology: the direct measurement of the growth of structure parametrized by $fD$. This method is based on the SNeIa peculiar velocities derived from the residual to the Hubble law as direct tracers of the full gravitational potential caused by large scale structure. With this technique, we could probe not only the properties of dark energy, but also the laws of gravity. In this paper we present the analytical framework and forecasts. We show that ZTF and LSST will be able to reach 5\% precision on $fD$ by 2027. Our analysis is not significantly sensitive to photo-typing, but known selection functions and spectroscopic redshifts are mandatory. We finally introduce an idea of a dedicated spectrograph that would get all the required information in addition to boost the efficiency to each SNeIa so that we could reach the 5\% precision within the first two years of LSST operation and the few percent level by the end of the survey.
