Discovery and Timing Analysis of New Pulsars in Globular Cluster NGC 5024: New Observations from FAST
The most distant globular cluster (GC) with known pulsars is NGC 5024 (M53). In this paper, we report the discovery of a new binary millisecond pulsar, PSR J1312+1810E (M53E), and present the new timing solutions for M53B–E based on 22 observations from the Five-hundred-meter Aperture Spherical radi...
| Main Authors: | , , , , , |
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| Format: | Article |
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IOP Publishing
2023-01-01
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| Series: | The Astrophysical Journal Letters |
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| Online Access: | https://doi.org/10.3847/2041-8213/acdee7 |
| _version_ | 1797699342015922176 |
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| author | Yujie Lian Zhichen Pan Haiyan Zhang P. C. C. Freire Shuo Cao Lei Qian |
| author_facet | Yujie Lian Zhichen Pan Haiyan Zhang P. C. C. Freire Shuo Cao Lei Qian |
| author_sort | Yujie Lian |
| collection | DOAJ |
| description | The most distant globular cluster (GC) with known pulsars is NGC 5024 (M53). In this paper, we report the discovery of a new binary millisecond pulsar, PSR J1312+1810E (M53E), and present the new timing solutions for M53B–E based on 22 observations from the Five-hundred-meter Aperture Spherical radio Telescope (FAST). These discoveries and timing work benefit from FAST’s high sensitivity. We find that M53C is the only isolated millisecond pulsar known in this distant GC, with a spin period of 12.53 ms and spin period derivative of 5.26 × 10 ^−20 s s ^−1 . Our results reveal orbital periods of 47.7, 5.8, and 2.4 days for M53B, D, and E, respectively. The companions, with masses of 0.25, 0.27, and 0.18 M _⊙ , respectively, are likely to be white dwarf stars; if they are extended objects, they do not eclipse the pulsars. We find no X-ray counterparts for these millisecond pulsars in archival Chandra images in the band of 0.3–8 keV. The characteristics of this pulsar population are similar to the population of millisecond pulsars in the Galactic disk, as expected from the low stellar density of M53. |
| first_indexed | 2024-03-12T04:06:39Z |
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| id | doaj.art-3f8bdf8fcb1d4e16ba366b185ffd2a3f |
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| issn | 2041-8205 |
| language | English |
| last_indexed | 2024-03-12T04:06:39Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
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| series | The Astrophysical Journal Letters |
| spelling | doaj.art-3f8bdf8fcb1d4e16ba366b185ffd2a3f2023-09-03T11:16:13ZengIOP PublishingThe Astrophysical Journal Letters2041-82052023-01-019512L3710.3847/2041-8213/acdee7Discovery and Timing Analysis of New Pulsars in Globular Cluster NGC 5024: New Observations from FASTYujie Lian0https://orcid.org/0009-0001-6693-7555Zhichen Pan1https://orcid.org/0000-0001-9754-9777Haiyan Zhang2https://orcid.org/0000-0003-1908-2408P. C. C. Freire3https://orcid.org/0000-0003-1307-9435Shuo Cao4https://orcid.org/0000-0002-8870-981XLei Qian5https://orcid.org/0000-0003-0597-0957Institute for Frontiers in Astronomy and Astrophysics, Beijing Normal University , Beijing 102206, People's Republic of China ; caoshuo@bnu.edu.cn; Department of Astronomy, Beijing Normal University , Beijing 100875, People's Republic of ChinaNational Astronomical Observatories, Chinese Academy of Sciences , 20A Datun Road, Chaoyang District, Beijing, 100101, People's Republic of China panzc@bao.ac.cn, hyzhang@bao.ac.cn; CAS Key Laboratory of FAST, National Astronomical Observatories, Chinese Academy of Sciences , Beijing 100101, People's Republic of China; College of Astronomy and Space Sciences, University of Chinese Academy of Sciences , Beijing 100049, People's Republic of ChinaNational Astronomical Observatories, Chinese Academy of Sciences , 20A Datun Road, Chaoyang District, Beijing, 100101, People's Republic of China panzc@bao.ac.cn, hyzhang@bao.ac.cn; CAS Key Laboratory of FAST, National Astronomical Observatories, Chinese Academy of Sciences , Beijing 100101, People's Republic of China; College of Astronomy and Space Sciences, University of Chinese Academy of Sciences , Beijing 100049, People's Republic of ChinaMax-Planck-Institut fur Radioastronomie , Auf dem Hugel 69, D-53121 Bonn, GermanyInstitute for Frontiers in Astronomy and Astrophysics, Beijing Normal University , Beijing 102206, People's Republic of China ; caoshuo@bnu.edu.cn; Department of Astronomy, Beijing Normal University , Beijing 100875, People's Republic of ChinaNational Astronomical Observatories, Chinese Academy of Sciences , 20A Datun Road, Chaoyang District, Beijing, 100101, People's Republic of China panzc@bao.ac.cn, hyzhang@bao.ac.cn; CAS Key Laboratory of FAST, National Astronomical Observatories, Chinese Academy of Sciences , Beijing 100101, People's Republic of China; College of Astronomy and Space Sciences, University of Chinese Academy of Sciences , Beijing 100049, People's Republic of ChinaThe most distant globular cluster (GC) with known pulsars is NGC 5024 (M53). In this paper, we report the discovery of a new binary millisecond pulsar, PSR J1312+1810E (M53E), and present the new timing solutions for M53B–E based on 22 observations from the Five-hundred-meter Aperture Spherical radio Telescope (FAST). These discoveries and timing work benefit from FAST’s high sensitivity. We find that M53C is the only isolated millisecond pulsar known in this distant GC, with a spin period of 12.53 ms and spin period derivative of 5.26 × 10 ^−20 s s ^−1 . Our results reveal orbital periods of 47.7, 5.8, and 2.4 days for M53B, D, and E, respectively. The companions, with masses of 0.25, 0.27, and 0.18 M _⊙ , respectively, are likely to be white dwarf stars; if they are extended objects, they do not eclipse the pulsars. We find no X-ray counterparts for these millisecond pulsars in archival Chandra images in the band of 0.3–8 keV. The characteristics of this pulsar population are similar to the population of millisecond pulsars in the Galactic disk, as expected from the low stellar density of M53.https://doi.org/10.3847/2041-8213/acdee7Globular star clustersMillisecond pulsarsBinary pulsarsRadio telescopes |
| spellingShingle | Yujie Lian Zhichen Pan Haiyan Zhang P. C. C. Freire Shuo Cao Lei Qian Discovery and Timing Analysis of New Pulsars in Globular Cluster NGC 5024: New Observations from FAST The Astrophysical Journal Letters Globular star clusters Millisecond pulsars Binary pulsars Radio telescopes |
| title | Discovery and Timing Analysis of New Pulsars in Globular Cluster NGC 5024: New Observations from FAST |
| title_full | Discovery and Timing Analysis of New Pulsars in Globular Cluster NGC 5024: New Observations from FAST |
| title_fullStr | Discovery and Timing Analysis of New Pulsars in Globular Cluster NGC 5024: New Observations from FAST |
| title_full_unstemmed | Discovery and Timing Analysis of New Pulsars in Globular Cluster NGC 5024: New Observations from FAST |
| title_short | Discovery and Timing Analysis of New Pulsars in Globular Cluster NGC 5024: New Observations from FAST |
| title_sort | discovery and timing analysis of new pulsars in globular cluster ngc 5024 new observations from fast |
| topic | Globular star clusters Millisecond pulsars Binary pulsars Radio telescopes |
| url | https://doi.org/10.3847/2041-8213/acdee7 |
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