NAOC Open IR
Luminosity of a radio pulsar and its new emission death line
Wu, Qing-Dong1,3; Zhi, Qi-Jun1,3; Zhang, Cheng-Min2,4; Wang, De-Hua1,3; Ye, Chang-Qing1,3
2020-11-01
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
ISSN1674-4527
Volume20Issue:11Pages:8
AbstractWe investigated the pulsar radio luminosity (L), emission efficiency (ratio of radio luminosity to its spin-down power (E)over dot), and death line in the magnetic field (B) versus spin period (P) diagram. We found that the dependence of pulsar radio luminosity on its spin-down power (L - (E)over dot) is very weak, shown as L similar to (E)over dot(0.06), which deduces an equivalent inverse correlation between emission efficiency and spin-down power as xi similar to (E)over dot(-0.94). Furthermore, we examined the distributions of radio luminosity of millisecond and normal pulsars and found that for the similar spin-down powers, the radio luminosity of millisecond pulsars is about one order of magnitude lower than that of the normal pulsars. The analysis of pulsar radio flux suggests that these correlations are not due to a selective effect but are intrinsic to the pulsar radio emission physics. Their radio radiations may be dominated by the different radiation mechanisms. The cut-off phenomenon of currently observed radio pulsars in B - P diagram is usually referred as the "pulsar death line", which corresponds to (E)over dot approximate to 10(30) erg s(-1) and is obtained by the cut-off voltage of electron acceleration gap in the polar cap model of pulsar proposed by Ruderman and Sutherland. Observationally, this death line can be inferred by the actual observed pulsar flux S >= 1mJy and 1 kpc distance, together with the maximum radio emission efficiency of 1%. However, the observation data show that the 37 pulsars pass over the death line, including the recently observed two pulsars with long periods of 23.5 s and 12.1 s, which violate the prediction of the polar cap model. At present, the actual observed pulsar flux can reach 0.01mJy by FAST telescope. This will arise the observational limit of spin-down power of pulsars as low as (E)over dot approximate to 10(28) erg s(-1). This means that the new death line is downward shifted two orders of magnitude, which might be favorably referred as the "observational limit-line". Accordingly, the pulsar theoretical model for the cut-off voltage of gap should be heavily modified.
Keywordstars: neutron pulsars: general stars: fundamental parameters
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and Technology Fund of Guizhou Province ; Science and Technology Fund of Guizhou Province ; Foundation of Guizhou Provincial Education Department ; Foundation of Guizhou Provincial Education Department ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; CAS International Partnership Program ; CAS International Partnership Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and Technology Fund of Guizhou Province ; Science and Technology Fund of Guizhou Province ; Foundation of Guizhou Provincial Education Department ; Foundation of Guizhou Provincial Education Department ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; CAS International Partnership Program ; CAS International Partnership Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and Technology Fund of Guizhou Province ; Science and Technology Fund of Guizhou Province ; Foundation of Guizhou Provincial Education Department ; Foundation of Guizhou Provincial Education Department ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; CAS International Partnership Program ; CAS International Partnership Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and Technology Fund of Guizhou Province ; Science and Technology Fund of Guizhou Province ; Foundation of Guizhou Provincial Education Department ; Foundation of Guizhou Provincial Education Department ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; CAS International Partnership Program ; CAS International Partnership Program
DOI10.1088/1674-4527/20/11/188
WOS KeywordACCELERATION ; EVOLUTION ; GAPS
Language英语
Funding ProjectNational Natural Science Foundation of China[U1731238] ; National Natural Science Foundation of China[1731218] ; National Natural Science Foundation of China[11565010] ; National Natural Science Foundation of China[11773005] ; National Natural Science Foundation of China[U1631236] ; National Natural Science Foundation of China[U1938117] ; National Natural Science Foundation of China[11703001] ; National Natural Science Foundation of China[11690024] ; National Natural Science Foundation of China[11725313] ; Science and Technology Fund of Guizhou Province[(2015)4015] ; Science and Technology Fund of Guizhou Province[NAOC-Y834081V01] ; Science and Technology Fund of Guizhou Province[(2016)-4008] ; Science and Technology Fund of Guizhou Province[(2017)5726-37] ; Foundation of Guizhou Provincial Education Department[KY(2020)003] ; National Program on Key Research and Development Project[2017YFA0402600] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB23000000] ; CAS International Partnership Program[114A11KYSB20160008]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and Technology Fund of Guizhou Province ; Science and Technology Fund of Guizhou Province ; Foundation of Guizhou Provincial Education Department ; Foundation of Guizhou Provincial Education Department ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; CAS International Partnership Program ; CAS International Partnership Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and Technology Fund of Guizhou Province ; Science and Technology Fund of Guizhou Province ; Foundation of Guizhou Provincial Education Department ; Foundation of Guizhou Provincial Education Department ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; CAS International Partnership Program ; CAS International Partnership Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and Technology Fund of Guizhou Province ; Science and Technology Fund of Guizhou Province ; Foundation of Guizhou Provincial Education Department ; Foundation of Guizhou Provincial Education Department ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; CAS International Partnership Program ; CAS International Partnership Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and Technology Fund of Guizhou Province ; Science and Technology Fund of Guizhou Province ; Foundation of Guizhou Provincial Education Department ; Foundation of Guizhou Provincial Education Department ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; CAS International Partnership Program ; CAS International Partnership Program
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000593529500001
PublisherNATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/80634
Collection中国科学院国家天文台
Corresponding AuthorWu, Qing-Dong
Affiliation1.Guizhou Normal Univ, Sch Phys & Elect Sci, Guiyang 550001, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China
3.Guizhou Prov Key Lab Radio Astron & Data Proc, Guiyang 550001, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Wu, Qing-Dong,Zhi, Qi-Jun,Zhang, Cheng-Min,et al. Luminosity of a radio pulsar and its new emission death line[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2020,20(11):8.
APA Wu, Qing-Dong,Zhi, Qi-Jun,Zhang, Cheng-Min,Wang, De-Hua,&Ye, Chang-Qing.(2020).Luminosity of a radio pulsar and its new emission death line.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,20(11),8.
MLA Wu, Qing-Dong,et al."Luminosity of a radio pulsar and its new emission death line".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 20.11(2020):8.
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