Investigation of Nulling and Subpulse-drifting Properties of PSR J1649+2533 with FAST
We report the nulling and subpulse-drifting properties of PSR J1649+2533 with observations of the Five-hundred-meter Aperture Spherical Radio Telescope (FAST). The FAST observations reveal that the nulling fraction of this pulsar is about 20.9% ± 0.8% at 1250 MHz. The statistical study of the durati...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2024-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/ad2519 |
| _version_ | 1797289402366427136 |
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| author | Lunhua Shang Xin Xu Yujia Liu Shijun Dang Aijun Dong Lijun Pang Yan Yu Qingying Li |
| author_facet | Lunhua Shang Xin Xu Yujia Liu Shijun Dang Aijun Dong Lijun Pang Yan Yu Qingying Li |
| author_sort | Lunhua Shang |
| collection | DOAJ |
| description | We report the nulling and subpulse-drifting properties of PSR J1649+2533 with observations of the Five-hundred-meter Aperture Spherical Radio Telescope (FAST). The FAST observations reveal that the nulling fraction of this pulsar is about 20.9% ± 0.8% at 1250 MHz. The statistical study of the durations of the nulling and burst states shows that the burst states can persist for extended pulse periods, exceeding 100 periods in some cases, while the shortest lasts only a few pulse periods. The null states have a much shorter duration, with a maximum duration of less than 30 pulse periods. A comparative study between the pulse profiles of the first active pulse (FAP) and the last active pulse (LAP) shows that the pulse profiles of LAPs are stronger and wider than those of FAPs. An analysis of the two-dimensional fluctuation spectrum for the single-pulse stack indicates that the pulsar exhibits clear amplitude modulation and subpulse drifting. The periods are a P _3 = 2.5 ± 0.1 spin period and P _2 = 17.°0 ± 0.°5 at 1250 MHz, respectively. In addition, the multiband investigation shows that P _2 seems to increase with the increase of the observing frequency, i.e., P _2 ∝ ν ^0.8±0.1 . This seems to be caused by the increasing pulse-profile width with the frequency. The high-sensitivity FAST observations will enable a detailed understanding of the emission of this pulsar and provide important clues for theoretical studies of the radiation mechanism. |
| first_indexed | 2024-03-07T19:03:29Z |
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| institution | Directory Open Access Journal |
| issn | 1538-4357 |
| language | English |
| last_indexed | 2024-03-07T19:03:29Z |
| publishDate | 2024-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj.art-8656f781b33c408f872a8a08bb1202c92024-03-01T10:34:16ZengIOP PublishingThe Astrophysical Journal1538-43572024-01-0196327710.3847/1538-4357/ad2519Investigation of Nulling and Subpulse-drifting Properties of PSR J1649+2533 with FASTLunhua Shang0https://orcid.org/0000-0002-9173-4573Xin Xu1https://orcid.org/0009-0006-3224-4319Yujia Liu2Shijun Dang3https://orcid.org/0000-0002-2060-5539Aijun Dong4https://orcid.org/0000-0003-4151-0771Lijun Pang5Yan Yu6Qingying Li7Guizhou Normal University , Guiyang 550001, People's Republic of China ; lhshang@gznu.edu.cn, dangsj@gznu.edu.cn; Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing, Guizhou Normal University , Guiyang 550001, People's Republic of China; National Astronomical Observatories, Chinese Academy of Sciences , Beijing 100101, People's Republic of ChinaGuizhou Normal University , Guiyang 550001, People's Republic of China ; lhshang@gznu.edu.cn, dangsj@gznu.edu.cn; Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing, Guizhou Normal University , Guiyang 550001, People's Republic of ChinaGuizhou Normal University , Guiyang 550001, People's Republic of China ; lhshang@gznu.edu.cn, dangsj@gznu.edu.cn; The Nan Rendong Innovative Talent Experimental Class, Guizhou Normal University , Guiyang 550001, People's Republic of ChinaGuizhou Normal University , Guiyang 550001, People's Republic of China ; lhshang@gznu.edu.cn, dangsj@gznu.edu.cn; Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing, Guizhou Normal University , Guiyang 550001, People's Republic of ChinaGuizhou Normal University , Guiyang 550001, People's Republic of China ; lhshang@gznu.edu.cn, dangsj@gznu.edu.cn; Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing, Guizhou Normal University , Guiyang 550001, People's Republic of ChinaGuizhou Normal University , Guiyang 550001, People's Republic of China ; lhshang@gznu.edu.cn, dangsj@gznu.edu.cnGuizhou Normal University , Guiyang 550001, People's Republic of China ; lhshang@gznu.edu.cn, dangsj@gznu.edu.cn; Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing, Guizhou Normal University , Guiyang 550001, People's Republic of ChinaGuizhou Normal University , Guiyang 550001, People's Republic of China ; lhshang@gznu.edu.cn, dangsj@gznu.edu.cn; Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing, Guizhou Normal University , Guiyang 550001, People's Republic of ChinaWe report the nulling and subpulse-drifting properties of PSR J1649+2533 with observations of the Five-hundred-meter Aperture Spherical Radio Telescope (FAST). The FAST observations reveal that the nulling fraction of this pulsar is about 20.9% ± 0.8% at 1250 MHz. The statistical study of the durations of the nulling and burst states shows that the burst states can persist for extended pulse periods, exceeding 100 periods in some cases, while the shortest lasts only a few pulse periods. The null states have a much shorter duration, with a maximum duration of less than 30 pulse periods. A comparative study between the pulse profiles of the first active pulse (FAP) and the last active pulse (LAP) shows that the pulse profiles of LAPs are stronger and wider than those of FAPs. An analysis of the two-dimensional fluctuation spectrum for the single-pulse stack indicates that the pulsar exhibits clear amplitude modulation and subpulse drifting. The periods are a P _3 = 2.5 ± 0.1 spin period and P _2 = 17.°0 ± 0.°5 at 1250 MHz, respectively. In addition, the multiband investigation shows that P _2 seems to increase with the increase of the observing frequency, i.e., P _2 ∝ ν ^0.8±0.1 . This seems to be caused by the increasing pulse-profile width with the frequency. The high-sensitivity FAST observations will enable a detailed understanding of the emission of this pulsar and provide important clues for theoretical studies of the radiation mechanism.https://doi.org/10.3847/1538-4357/ad2519Radio pulsarsPulsarsNeutron starsNon-thermal radiation sources |
| spellingShingle | Lunhua Shang Xin Xu Yujia Liu Shijun Dang Aijun Dong Lijun Pang Yan Yu Qingying Li Investigation of Nulling and Subpulse-drifting Properties of PSR J1649+2533 with FAST The Astrophysical Journal Radio pulsars Pulsars Neutron stars Non-thermal radiation sources |
| title | Investigation of Nulling and Subpulse-drifting Properties of PSR J1649+2533 with FAST |
| title_full | Investigation of Nulling and Subpulse-drifting Properties of PSR J1649+2533 with FAST |
| title_fullStr | Investigation of Nulling and Subpulse-drifting Properties of PSR J1649+2533 with FAST |
| title_full_unstemmed | Investigation of Nulling and Subpulse-drifting Properties of PSR J1649+2533 with FAST |
| title_short | Investigation of Nulling and Subpulse-drifting Properties of PSR J1649+2533 with FAST |
| title_sort | investigation of nulling and subpulse drifting properties of psr j1649 2533 with fast |
| topic | Radio pulsars Pulsars Neutron stars Non-thermal radiation sources |
| url | https://doi.org/10.3847/1538-4357/ad2519 |
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