Confronting sound speed resonance with pulsar timing arrays

doi:10.1088/1475-7516/2023/09/016

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	Confronting sound speed resonance with pulsar timing arrays
	Jin, Jia-Heng ; Chen, Zu-Cheng ; Yi, Zhu ; You, Zhi-Qiang ; Liu, Lang 2,3; Wu, You 4,5,7
刊名	JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
	2023
期号	9 页码:16
关键词	PRIMORDIAL BLACK-HOLES
ISSN号	1475-7516
DOI	10.1088/1475-7516/2023/09/016
英文摘要	The stochastic signal detected by pulsar timing arrays (PTAs) has raised great interest in understanding its physical origin. Assuming the signal is a cosmological gravitational-wave background produced by overly large primordial curvature perturbations, we investigate the sound speed resonance effect with an oscillatory behavior using the combined PTA data from NANOGrav 15-yr data set, PPTA DR3, and EPTA DR2. We find that the stochastic signal can be explained by the induced gravitational waves sourced by the sound speed resonance mechanism, with the oscillation frequency f* is an element of [1.51, 4.90] x 10-7Hz and the start time of oscillation \|tau 0\| is an element of [2.05, 106] x 107s.
学科主题	Astronomy & Astrophysics ; Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/27943]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Sch Phys Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 3.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China 4.Beijing Normal Univ, Adv Inst Nat Sci, Zhuhai 519087, Peoples R China 5.Hunan Normal Univ, Dept Phys, Changsha 410081, Hunan, Peoples R China 6.Hunan Normal Univ, Synergist Innovat Ctr Quantum Effects & Applicat, Changsha 410081, Hunan, Peoples R China 7.Henan Acad Sci, Zhengzhou 450046, Henan, Peoples R China 8.Hunan Univ Arts & Sci, Coll Math & Phys, Changde 415000, Peoples R China
推荐引用方式 GB/T 7714	Jin, Jia-Heng,Chen, Zu-Cheng,Yi, Zhu,et al. Confronting sound speed resonance with pulsar timing arrays[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2023(9):16.
APA	Jin, Jia-Heng,Chen, Zu-Cheng,Yi, Zhu,You, Zhi-Qiang,Liu, Lang,&Wu, You.(2023).Confronting sound speed resonance with pulsar timing arrays.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(9),16.
MLA	Jin, Jia-Heng,et al."Confronting sound speed resonance with pulsar timing arrays".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .9(2023):16.