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| Simulation for Distributions of Several Geometric Parameters in Nulling Pulsars | |
Han, X. H.1 ; Yuen, R.1,2,3
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| 2022-12-01 | |
| Source Publication | ASTROPHYSICAL JOURNAL
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| ISSN | 0004-637X |
| Volume | 940Issue:2Pages:110 |
| Contribution Rank | 1 |
| Abstract | We investigate the distributions of the obliquity angle and impact parameters of nulling pulsars of different duty cycles based on the simulation of more than 600,000 samples. We adopt a purely geometric approach for pulsar visibility, in which visible emission is emitted tangentially to the magnetic field line and parallel to the line-of-sight direction. The geometry is incorporated with the model for pulsar magnetospheres of multiple emission states, in which the plasma charge density is dependent on the emission state. We assume that an emission state can only exist between two limiting conditions described by the vacuum and corotation models, respectively. In this model, pulse nulling corresponds to emission switching to a state in which the plasma charge density is zero. The event is detectable only if the switching occurs at source points that lie on a trajectory, whose locus defines the locations of visible emission, within an open-field region. Our results show that detectable nulling is dependent on all three parameters, such that nulling pulsars prefer a small obliquity angle and duty cycle, and tend to have positive impact parameters. We find that the total population of nulling pulsars in our samples is around 23%, of which about 47% possess a duty cycle of 0.1 or smaller. The former implies that there are more nulling pulsars than currently known. Our model predicts that the number of nulling pulsars increases as the obliquity angle decreases, which also implies that the occurrence of nulling in a pulsar should evolve over time. |
| DOI | 10.3847/1538-4357/ac98b5 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | RADIO-EMISSION ALTITUDE ; EMPIRICAL-THEORY ; INTENSITY MEASUREMENTS ; DRIFTING SUBPULSES ; WIDTH STATISTICS ; POLARIZATION |
| Funding Project | Key Laboratory of Xinjiang Uygur Autonomous Region[2020D04049] ; National SKA Program of China[2020SKA0120200] ; Natural Science Foundation of China[12041304] ; Natural Science Foundation of China[U1838109] ; Natural Science Foundation of China[11873080] ; Natural Science Foundation of China[12041301] ; 2018 Project of Xinjiang Uygur Autonomous Region of China for Flexibly Fetching in Upscale Talents ; Xiaofeng Yang's Xinjiang Tianchi Bairen project ; CAS Pioneer Hundred Talents Program |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:000890351500001 |
| Publisher | IOP Publishing Ltd |
| Funding Organization | Key Laboratory of Xinjiang Uygur Autonomous Region ; National SKA Program of China ; Natural Science Foundation of China ; 2018 Project of Xinjiang Uygur Autonomous Region of China for Flexibly Fetching in Upscale Talents ; Xiaofeng Yang's Xinjiang Tianchi Bairen project ; CAS Pioneer Hundred Talents Program |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/4975 |
| Collection | 射电天文研究室_脉冲星研究团组 |
| Corresponding Author | Yuen, R. |
| Affiliation | 1.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China 2.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Peoples R China 3.Univ Sydney, Sch Phys, SIfA, Sydney, NSW 2006, Australia |
| First Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Corresponding Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | Han, X. H.,Yuen, R.. Simulation for Distributions of Several Geometric Parameters in Nulling Pulsars[J]. ASTROPHYSICAL JOURNAL,2022,940(2):110. |
| APA | Han, X. H.,&Yuen, R..(2022).Simulation for Distributions of Several Geometric Parameters in Nulling Pulsars.ASTROPHYSICAL JOURNAL,940(2),110. |
| MLA | Han, X. H.,et al."Simulation for Distributions of Several Geometric Parameters in Nulling Pulsars".ASTROPHYSICAL JOURNAL 940.2(2022):110. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| Han-2022-Simulation （1158KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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