Axion-like universal gravitational wave interpretation of pulsar timing array data

被引：2

作者：

Lozanov, Kaloian D. ^{[1
]}

Pi, Shi ^{[1
,2
,3
]}

Sasaki, Misao ^{[1
,4
,5
]}

Takhistov, Volodymyr ^{[1
,6
,7
,8
]}

Wang, Ao ^{[2
,9
]}

机构：

[1] Univ Tokyo, Kavli Inst Phys & Math Universe WPI, Kashiwa, Chiba 2778583, Japan

[2] Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China

[3] Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China

[4] Kyoto Univ, Yukawa Inst Theoret Phys, Ctr Gravitat Phys & Quantum Informat, Kyoto 6068502, Japan

[5] Natl Taiwan Univ, Leung Ctr Cosmol & Particle Astrophys, Taipei 10617, Taiwan

[6] High Energy Accelerator Res Org KEK, Int Ctr Quantum Field Measurement Syst Studies Uni, Oho 1-1, Tsukuba, Ibaraki 3050801, Japan

[7] High Energy Accelerator Res Org KEK, Inst Particle & Nucl Studies IPNS, Theory Ctr, Tsukuba 3050801, Japan

[8] Grad Univ Adv Studies SOKENDAI, 1-1 Oho, Tsukuba, Ibaraki 3050801, Japan

[9] Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China

来源：

CLASSICAL AND QUANTUM GRAVITY | 2025年 / 42卷 / 03期

关键词：

gravitational waves; solitons; pulsar timing arrays; SEARCH;

D O I：

10.1088/1361-6382/ad9e67

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Formation of cosmological solitons is generically accompanied by production of gravitational waves (GWs), with a universal GW background expected at frequency scales below that of non-linear dynamics. Beginning with a general phenomenological description of GWs associated with soliton formation, we demonstrate that universal GW background from axion-like particle solitonic oscillons provides a viable interpretation to the recent NANOGrav 15 year pulsar timing array (PTA) data, which does not suffer from the overproduction of primordial black holes. We show that PTA data displays preference for models where formed solitons do not strongly interact or cluster. Coincidence observations with Nancy Roman telescope will allow to discriminate between distinct scenarios of cosmological solitons.

引用

页数：14

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