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Precession of triaxially deformed neutron stars
Gao, Yong1,2; Shao, Lijing2,3
2021-02-04
Source PublicationASTRONOMISCHE NACHRICHTEN
ISSN0004-6337
Pages5
AbstractA deformed neutron star (NS) will precess if the instantaneous spin axis and the angular momentum are not aligned. Such a precession can produce continuous gravitational waves (GWs) and modulate electromagnetic pulse signals of pulsars. In this contribution, we extend our previous work in a more convenient parameterization. We treat NSs as rigid triaxial bodies and give analytical solutions for angular velocities and Euler angles. We summarize the general GW waveforms from freely precessing triaxial NSs and use Taylor expansions to obtain waveforms with a small wobble angle. For pulsar signals, we adopt a simple cone model to study the timing residuals and pulse profile modulations. In reality, the electromagnetic torque acts on pulsars and affects the precession behavior. Thereof, as an additional extension to our previous work, we consider a vacuum torque and display an illustrative example for the residuals of body-frame angular velocities. Detailed investigations concerning continuous GWs and modulated pulsar signals from forced precession of triaixal NSs will be given in future studies.
Keywordgravitational waves pulsars general methods analytical
Funding OrganizationNational SKA Program of China ; National SKA Program of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Max Planck Partner Group ; Max Planck Partner Group ; China Association for Science and Technology ; China Association for Science and Technology ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Peking University ; Peking University ; National SKA Program of China ; National SKA Program of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Max Planck Partner Group ; Max Planck Partner Group ; China Association for Science and Technology ; China Association for Science and Technology ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Peking University ; Peking University ; National SKA Program of China ; National SKA Program of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Max Planck Partner Group ; Max Planck Partner Group ; China Association for Science and Technology ; China Association for Science and Technology ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Peking University ; Peking University ; National SKA Program of China ; National SKA Program of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Max Planck Partner Group ; Max Planck Partner Group ; China Association for Science and Technology ; China Association for Science and Technology ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Peking University ; Peking University
DOI10.1002/asna.202113935
Language英语
Funding ProjectNational SKA Program of China[2020SKA0120300] ; Chinese Academy of Sciences[XDB23010200] ; Max Planck Partner Group ; China Association for Science and Technology[2018QNRC001] ; National Natural Science Foundation of China[11721303] ; National Natural Science Foundation of China[11991053] ; National Natural Science Foundation of China[11975027] ; Peking University
Funding OrganizationNational SKA Program of China ; National SKA Program of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Max Planck Partner Group ; Max Planck Partner Group ; China Association for Science and Technology ; China Association for Science and Technology ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Peking University ; Peking University ; National SKA Program of China ; National SKA Program of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Max Planck Partner Group ; Max Planck Partner Group ; China Association for Science and Technology ; China Association for Science and Technology ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Peking University ; Peking University ; National SKA Program of China ; National SKA Program of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Max Planck Partner Group ; Max Planck Partner Group ; China Association for Science and Technology ; China Association for Science and Technology ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Peking University ; Peking University ; National SKA Program of China ; National SKA Program of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Max Planck Partner Group ; Max Planck Partner Group ; China Association for Science and Technology ; China Association for Science and Technology ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Peking University ; Peking University
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000614635600001
PublisherWILEY-V C H VERLAG GMBH
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/79673
Collection中国科学院国家天文台
Corresponding AuthorGao, Yong
Affiliation1.Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China
2.Peking Univ, Kavli Inst Astron & Astrophys, Beijing, Peoples R China
3.Chinese Acad Sci, Natl Astron Observ, Beijing, Peoples R China
Recommended Citation
GB/T 7714		 Gao, Yong,Shao, Lijing. Precession of triaxially deformed neutron stars[J]. ASTRONOMISCHE NACHRICHTEN,2021:5.
APA Gao, Yong,&Shao, Lijing.(2021).Precession of triaxially deformed neutron stars.ASTRONOMISCHE NACHRICHTEN,5.
MLA Gao, Yong,et al."Precession of triaxially deformed neutron stars".ASTRONOMISCHE NACHRICHTEN (2021):5.
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