论文标题
宇宙学的限制与视线距离光学星系和FRB色散度量之间的跨相关性的改善
Improvement of cosmological constraints with the cross correlation between line-of-sight optical galaxy and FRB dispersion measure
论文作者
论文摘要
快速无线电爆发（以下称FRB）可以通过研究红移的函数来宇宙学中使用。物质分布的大规模结构被视为该应用的主要错误预算。使用光学银河系和分散度量模拟模拟，我们表明，星系数密度可以用作大规模电子密度的示踪剂，并有助于提高DM的测量作为红移的函数。我们已经表明，在给定的局部FRB源附近1'内的视线星系数计数可以帮助将宇宙参数约束提高20％以上。
Fast Radio Bursts (hereafter FRBs) can be used in cosmology by studying the Dispersion Measure (hereafter DM) as a function of redshift. The large scale structure of matter distribution is regarded as a major error budget for such application. Using optical galaxy and dispersion measure mocks built from N-body simulations, we have shown that the galaxy number density can be used as a tracer for large scale electron density and help improve the measurement of DM as a function of redshift. We have shown that, using the line-of-sight galaxy number counts within 1' around the given localized FRB source can help improve the cosmological parameter constraints by more than 20%.
