论文标题
在模拟中对光环固有比对的各向异性原始非高斯的烙印
Imprint of anisotropic primordial non-Gaussianity on halo intrinsic alignments in simulations
论文作者
论文摘要
我们首次使用$ n $ - 体体大规模结构形成，我们表明，各向异性原始非高斯（PNG）会导致相关的修改，由$ 1/k^2 $在小$ k $限制中给出，在三维范围内的范围（降低了静脉）的范围（降低了），而降低了态度的三维功能，并构成静脉内的动力。不受影响。我们讨论观察天空同一区域的宽面积成像和光谱调查使我们能够以与宇宙微波背景相比或更好的精度来限制四杆PNG系数$ f _ {\ rm nl}^{s = 2} $。
Using $N$-body simulations of cosmological large-scale structure formation, for the first time, we show that the anisotropic primordial non-Gaussianity (PNG) causes a scale-dependent modification, given by $1/k^2$ at small $k$ limit, in the three-dimensional power spectra of halo shapes (intrinsic alignments), whilst the conventional power spectrum of halo number density field remains unaffected. We discuss that wide-area imaging and spectrocopic surveys observing the same region of the sky allow us to constrain the quadrupole PNG coefficient $f_{\rm NL}^{s=2}$ at a precision comparable with or better than that of the cosmic microwave background.
