Single-pulse Morphology of PSR J1935+1616 (B1933+16) Based on Archival Data from FAST
We utilized archive data from the Five-hundred-meter Aperture Spherical Radio Telescope (FAST) to analyze the single-pulse profile morphology of PSR J1935+1616 (B1933+16). The results show that PSR J1935+1616 exhibits significant micropulses as well as various changes in single-pulse profile morphol...
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IOP Publishing
2025-01-01
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| Online Access: | https://doi.org/10.3847/1538-4357/adb7cd |
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| author | R. W. Tian R. S. Zhao Marilyn Cruces H. Liu D. Li P. Wang C. H. Niu Biping Gong C. C. Miao X. Zhu H. W. Xu W. L. Li S. D. Wang Z. F. Tu Q. J. Zhi S. J. Dang L. H. Shang S. Xiao |
| author_facet | R. W. Tian R. S. Zhao Marilyn Cruces H. Liu D. Li P. Wang C. H. Niu Biping Gong C. C. Miao X. Zhu H. W. Xu W. L. Li S. D. Wang Z. F. Tu Q. J. Zhi S. J. Dang L. H. Shang S. Xiao |
| author_sort | R. W. Tian |
| collection | DOAJ |
| description | We utilized archive data from the Five-hundred-meter Aperture Spherical Radio Telescope (FAST) to analyze the single-pulse profile morphology of PSR J1935+1616 (B1933+16). The results show that PSR J1935+1616 exhibits significant micropulses as well as various changes in single-pulse profile morphology. In the FAST archive data, a total of 969 single pulses with microstructure were identified, accounting for 9.69% of the total pulse sample, with characteristic widths of $127.6{3}_{-46.25}^{+70.74}$ μ s. About half of these pulses display quasiperiodic micropulses, with a periodicity of 231.77 ± 9.90 μ s. Among the 520 single pulses with quasiperiodic microstructure, 208 also exhibit quasiperiodicity in circular polarization, with a characteristic period of $244.7{0}_{-21.05}^{+45.66}\,\mu \,\rm{s}\,$ . The micropulse characteristic width in circular polarization is 106.52 ± 46.14 μ s. Compared to normal pulses, the relative energy ( E /< E >) of a single pulse with microstructure follows a double-Gaussian distribution, while those of normal pulses follow a single-Gaussian distribution. Based on the intensity of the leading and trailing components in the single-pulse profile morphology of PSR J1935+1616, we classified the pulses into four morphological modes (A, B, C, and D). The relative energy distribution of pulses in Mode A is significantly different from the others, following a double-Gaussian distribution, while the relative energy distributions in Modes B, C, and D follow a single-Gaussian distribution. Our study also suggests a possible correlation between micropulses and single-pulse profile morphology. Single pulses with micropulses are most likely to occur in Mode A, while their occurrence is least likely in Mode D. |
| format | Article |
| id | doaj-art-c8593c20523b4a6e89948afb9d6b29d8 |
| institution | Kabale University |
| issn | 1538-4357 |
| language | English |
| publishDate | 2025-01-01 |
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| series | The Astrophysical Journal |
| spelling | doaj-art-c8593c20523b4a6e89948afb9d6b29d82025-08-20T03:44:14ZengIOP PublishingThe Astrophysical Journal1538-43572025-01-01982210710.3847/1538-4357/adb7cdSingle-pulse Morphology of PSR J1935+1616 (B1933+16) Based on Archival Data from FASTR. W. Tian0https://orcid.org/0009-0007-3215-2964R. S. Zhao1https://orcid.org/0000-0002-1243-0476Marilyn Cruces2H. Liu3D. Li4P. Wang5https://orcid.org/0000-0002-3386-7159C. H. Niu6https://orcid.org/0000-0001-6651-7799Biping Gong7C. C. Miao8X. Zhu9H. W. Xu10https://orcid.org/0009-0003-4524-6530W. L. Li11S. D. Wang12Z. F. Tu13Q. J. Zhi14https://orcid.org/0000-0001-9389-5197S. J. Dang15L. H. Shang16https://orcid.org/0000-0002-9173-4573S. Xiao17https://orcid.org/0000-0003-2957-2806Guizhou Normal University , Guiyang 550001, People’s Republic of China ; 201907007@gznu.edu.cnGuizhou Normal University , Guiyang 550001, People’s Republic of China ; 201907007@gznu.edu.cnCentre of Astro-Engineering , Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, Santiago 7810000, Chile; Joint ALMA Observatory , Alonso de Córdova 3107, Vitacura, Santiago 7630000, Chile; Department of Electrical Engineering , Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, Santiago 7810000, Chile; Max-Planck-Institut für Radioastronomie , Auf dem Hügel 69, D-53121 Bonn, GermanyGuizhou Normal University , Guiyang 550001, People’s Republic of China ; 201907007@gznu.edu.cnDepartment of Astronomy , Tsinghua University, Beijing 100084, People’s Republic of China; National Astronomical Observatories , Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100101, People’s Republic of China ; wangpei@nao.cas.cn; Zhejiang Lab , Hangzhou, Zhejiang 311121, People’s Republic of ChinaNational Astronomical Observatories , Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100101, People’s Republic of China ; wangpei@nao.cas.cn; Institute for Frontiers in Astronomy and Astrophysics , Beijing Normal University, Beijing 102206, People’s Republic of ChinaCentral China Normal University , Wuhan 430079, People’s Republic of ChinaDepartment of Physics , Huazhong University of Science and Technology, Wuhan 430074, People’s Republic of ChinaZhejiang Lab , Hangzhou, Zhejiang 311121, People’s Republic of ChinaGuizhou Normal University , Guiyang 550001, People’s Republic of China ; 201907007@gznu.edu.cnCentral China Normal University , Wuhan 430079, People’s Republic of ChinaGuizhou Normal University , Guiyang 550001, People’s Republic of China ; 201907007@gznu.edu.cnGuizhou Normal University , Guiyang 550001, People’s Republic of China ; 201907007@gznu.edu.cnGuizhou Normal University , Guiyang 550001, People’s Republic of China ; 201907007@gznu.edu.cnGuizhou Normal University , Guiyang 550001, People’s Republic of China ; 201907007@gznu.edu.cnGuizhou Normal University , Guiyang 550001, People’s Republic of China ; 201907007@gznu.edu.cnGuizhou Normal University , Guiyang 550001, People’s Republic of China ; 201907007@gznu.edu.cnGuizhou Normal University , Guiyang 550001, People’s Republic of China ; 201907007@gznu.edu.cnWe utilized archive data from the Five-hundred-meter Aperture Spherical Radio Telescope (FAST) to analyze the single-pulse profile morphology of PSR J1935+1616 (B1933+16). The results show that PSR J1935+1616 exhibits significant micropulses as well as various changes in single-pulse profile morphology. In the FAST archive data, a total of 969 single pulses with microstructure were identified, accounting for 9.69% of the total pulse sample, with characteristic widths of $127.6{3}_{-46.25}^{+70.74}$ μ s. About half of these pulses display quasiperiodic micropulses, with a periodicity of 231.77 ± 9.90 μ s. Among the 520 single pulses with quasiperiodic microstructure, 208 also exhibit quasiperiodicity in circular polarization, with a characteristic period of $244.7{0}_{-21.05}^{+45.66}\,\mu \,\rm{s}\,$ . The micropulse characteristic width in circular polarization is 106.52 ± 46.14 μ s. Compared to normal pulses, the relative energy ( E /< E >) of a single pulse with microstructure follows a double-Gaussian distribution, while those of normal pulses follow a single-Gaussian distribution. Based on the intensity of the leading and trailing components in the single-pulse profile morphology of PSR J1935+1616, we classified the pulses into four morphological modes (A, B, C, and D). The relative energy distribution of pulses in Mode A is significantly different from the others, following a double-Gaussian distribution, while the relative energy distributions in Modes B, C, and D follow a single-Gaussian distribution. Our study also suggests a possible correlation between micropulses and single-pulse profile morphology. Single pulses with micropulses are most likely to occur in Mode A, while their occurrence is least likely in Mode D.https://doi.org/10.3847/1538-4357/adb7cdPulsarsRadio pulsars |
| spellingShingle | R. W. Tian R. S. Zhao Marilyn Cruces H. Liu D. Li P. Wang C. H. Niu Biping Gong C. C. Miao X. Zhu H. W. Xu W. L. Li S. D. Wang Z. F. Tu Q. J. Zhi S. J. Dang L. H. Shang S. Xiao Single-pulse Morphology of PSR J1935+1616 (B1933+16) Based on Archival Data from FAST The Astrophysical Journal Pulsars Radio pulsars |
| title | Single-pulse Morphology of PSR J1935+1616 (B1933+16) Based on Archival Data from FAST |
| title_full | Single-pulse Morphology of PSR J1935+1616 (B1933+16) Based on Archival Data from FAST |
| title_fullStr | Single-pulse Morphology of PSR J1935+1616 (B1933+16) Based on Archival Data from FAST |
| title_full_unstemmed | Single-pulse Morphology of PSR J1935+1616 (B1933+16) Based on Archival Data from FAST |
| title_short | Single-pulse Morphology of PSR J1935+1616 (B1933+16) Based on Archival Data from FAST |
| title_sort | single pulse morphology of psr j1935 1616 b1933 16 based on archival data from fast |
| topic | Pulsars Radio pulsars |
| url | https://doi.org/10.3847/1538-4357/adb7cd |
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