| Frequency dependence in the emission from subpulse drifting pulsars | |
Han, Xiao-Hong1 ; Yuen, Rai1,2,3
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| 2021-11-01 | |
| Source Publication | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
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| ISSN | 1674-4527 |
| Volume | 21Issue:9Pages:228 |
| Contribution Rank | 1 |
| Abstract | We investigate relations in the emission properties as revealed by drifting subpulses detected at different observing frequencies based on the method that incorporates the rotating carousels in pulsar magnetospheres of multiple emission states. An emission state is associated with particular emission properties as determined by the drifting subpulses at a particular frequency, and different emission states obtained at different frequencies reveal the variation of emission properties across the emission region. The method allows the determination of the essential radio emission properties such as the relative emission height, subpulse number, charge density and the plasma flow relative to corotation in an emission region for a particular frequency. We apply the method to seven pulsars that exhibit subpulse drifting along single drift-band at 326 MHz and 1429 MHz. Our results show that drifting subpulses observed at different frequencies correspond to particular emission states suggesting that the pulsar emission properties are frequency dependent. We show that emission follows the frequency-to-radius mapping for pulsars with obliquity angle greater than or similar to 30 degrees regardless of the sign and magnitude of the drift-rate. For pulsars with long rotation periods in our sample, the circulation time for the plasma to revolve once around the magnetosphere relative to corotation increases as the rotation period increases at both frequencies, but exhibits irregularity for pulsars with short rotation periods. Our results suggest that evolution of the obliquity angles in subpulse drifting pulsars is from large to small, and the emission region tends to be 'thicker' in younger pulsars. |
| Keyword | radiation mechanisms non-thermal pulsar general |
| DOI | 10.1088/1674-4527/21/9/228 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | GAMMA-RAY PULSARS ; EMPIRICAL-THEORY ; PAIR PRODUCTION ; SUB-PULSES ; GEOMETRY ; MODEL ; POLARIZATION ; MODULATION ; ALTITUDE ; MECHANISM |
| Funding Project | National Natural Science Foundation of China[U1838109] ; National Natural Science Foundation of China[11873080] ; National Natural Science Foundation of China[12041301] ; open program of the Key Laboratory of Xinjiang Uygur Autonomous Region[2020D04049] ; 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:000714212600001 |
| Publisher | NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES |
| Funding Organization | National Natural Science Foundation of China ; open program of the Key Laboratory of Xinjiang Uygur Autonomous Region ; 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/45760611-7/4325 |
| Collection | 科学传播中心_天文科普教育中心 |
| Corresponding Author | Yuen, Rai |
| Affiliation | 1.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 2.Chinese Acad Sci, Key Lab Radio Astron, Urumqi 830011, 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, Xiao-Hong,Yuen, Rai. Frequency dependence in the emission from subpulse drifting pulsars[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2021,21(9):228. |
| APA | Han, Xiao-Hong,&Yuen, Rai.(2021).Frequency dependence in the emission from subpulse drifting pulsars.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,21(9),228. |
| MLA | Han, Xiao-Hong,et al."Frequency dependence in the emission from subpulse drifting pulsars".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 21.9(2021):228. |
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| Han-2021-Frequency d（360KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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