Improved constraints on primordial gravitational waves in light of the H0 tension and BICEP/Keck data

被引：14
|
作者：
Ye, Gen [1 ,2 ]
Piao, Yun-Song [1 ,2 ,3 ,4 ]
机构：
[1] UCAS, Hangzhou Inst Adv Study, Sch Fundamental Phys & Math Sci, Hangzhou 310024, Peoples R China
[2] Univ Chinese Acad Sci, Sch Phys, Beijing 100049, Peoples R China
[3] Int Ctr Theoret Phys Asia Pacific, Hangzhou 100190, Peoples R China
[4] Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100190, Peoples R China
来源：
PHYSICAL REVIEW D | 2022年 / 106卷 / 04期
关键词：
INFLATIONARY UNIVERSE; POLARIZATION; FLATNESS; HORIZON; PLANCK; SAMPLE;
D O I：
10.1103/PhysRevD.106.043536
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The H0 tension that the standard ACDM model is suffering from can be resolved with prerecombination early dark energy. We present the first constraint on the tensor-to-scalar ratio r in corresponding H0-tension -free cosmologies using the most recent BICEP/Keck cosmic microwave background (CMB) B-mode polarization data. We find, combining BICEP/Keck with Planck18 CMB and baryon acoustic oscillation data, that the models with larger Hubble-Lemaitre-constant H0 will have tighter upper bound on r, and resolution of the H0 tension (H0 -73 km/s/Mpc) tightens the upper bound to r < 0.028(95% C.L.), 25% tighter than the ACDM constraint r < 0.036. We clarify the origin of this tightened bound.
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页数：9
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