论文标题
在Baryons存在下，物质功率谱和双光谱的同时建模
Simultaneous modelling of matter power spectrum and bispectrum in the presence of baryons
论文作者
论文摘要
我们证明，根据物理动机的处方，在仅重力模拟中取代颗粒的baryofification算法可以同时捕获男性物理学对物质2和3点统计的影响。具体而言，我们表明，我们对Baryonification算法的实施符合Baryons在功率谱和等边双光谱上引起的变化，该更改是在六个不同的宇宙学水动动力学模拟中测量的，最高为k <5 h/mpc和红移z <2。对于功率谱以及等边和挤压的双光谱，我们拟合的准确性通常为1％，对于具有极端反馈处方的模拟，它们在某种程度上降至3％。我们的结果支持重生化方法的物理假设，并鼓励它们在解释弱重力镜头和其他宇宙学可观察物中的使用。
We demonstrate that baryonification algorithms, which displace particles in gravity-only simulations according to physically-motivated prescriptions, can simultaneously capture the impact of baryonic physics on the 2 and 3-point statistics of matter. Specifically, we show that our implementation of a baryonification algorithm jointly fits the changes induced by baryons on the power spectrum and equilateral bispectrum on scales up to k < 5 h/Mpc and redshifts z<2, as measured in six different cosmological hydrodynamical simulations. The accuracy of our fits are typically 1% for the power spectrum, and for the equilateral and squeezed bispectra, which somewhat degrades to 3% for simulations with extreme feedback prescriptions. Our results support the physical assumptions underlying baryonification approaches, and encourage their use in interpreting weak gravitational lensing and other cosmological observables.
