Exact CMB B-mode power spectrum from anisotropic cosmic birefringence

被引：4

作者：

Namikawa, Toshiya ^{[1
]}

机构：

[1] Univ Tokyo, UTIAS, Kavli IPMU WPI, Ctr Data Driven Discovery, Kashiwa 2778583, Japan

来源：

PHYSICAL REVIEW D | 2024年 / 109卷 / 12期

关键词：

POLARIZATION;

D O I：

10.1103/PhysRevD.109.123521

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We calculate the cosmic microwave background Bmode power spectrum resulting from anisotropic cosmic birefringence, without relying on the thin approximation of the last scattering surface. Specifically, we consider the influence of anisotropic cosmic birefringence arising from massless axionlike particles. Comparing our results to those obtained using the thin approximation, we observe a suppression in the amplitude of the Bmode power spectrum by approximately an order of magnitude at large angular scales ( l less than or similar to 10 ) and by a factor of 2 at small angular scales ( l greater than or similar to 100 ) when not employing the thin approximation. We also constrain the amplitude of the angular power spectrum of the scale -invariant anisotropic cosmic birefringence using the SPTpol Bmode power spectrum. We find that the amplitude is constrained as A CB x 10 4 1 / 4 1 .03 & thorn; 0 .91 -0 .97 & eth; 2 sigma & THORN; .

引用

页数：10

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