The FAST Discovery of a Millisecond Pulsar M15O (PSR J2129+1210O) Hidden in the Harmonics of M15A (PSR J2129+1210A)

Abstract We report the discovery of an isolated millisecond pulsar M15O (J2129+1210O) from the globular cluster M15 (NGC 7078) with a period of ∼11.06686 ms and a dispersion measure of ∼67.44 cm −3 pc. Its spin period is so close to the 10th harmonic of the bright pulsar M15A (∼11.06647 ms) that it was missed in a previous pulsar search. We suggest adding the spectrum in the pulsar candidate diagnostic plot to identify new signals near the harmonics. M15O has the first spin frequency derivative and the second spin frequency derivative, being 1.79191(5) × 10 −14 Hz s −1 and 3.3133(6) × 10 −23 Hz s −2 , respectively. Its projected distance from the optical center of M15 is the closest among all the pulsars in M15. The origin can be something from the center of the massive and core-collapsed globular cluster M15.

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Publication Details

Journal
Research in Astronomy and Astrophysics
Published
2025-05-23
DOI
https://doi.org/10.1088/1674-4527/addc53
Citations
1
Primary Topic
Pulsars and Gravitational Waves Research
Type
article
Field-Weighted Citation Impact
1.15

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article

The FAST Discovery of a Millisecond Pulsar M15O (PSR J2129+1210O) Hidden in the Harmonics of M15A (PSR J2129+1210A)

Zhichen Pan, L. Zhang, Yaowei Li, Lei Qian et al.
1 citations
Research in Astronomy and Astrophysics
Pulsars and Gravitational Waves Research
1.15
article

The FAST Discovery of a Millisecond Pulsar M15O (PSR J2129+1210O) Hidden in the Harmonics of M15A (PSR J2129+1210A)

Zhichen Pan, L. Zhang, Yaowei Li, Lei Qian, Dejiang Yin, Baoda Li, Yujie Lian, Yuxiao Wu, Yinfeng Dai
article en
1 citations

Abstract

Abstract We report the discovery of an isolated millisecond pulsar M15O (J2129+1210O) from the globular cluster M15 (NGC 7078) with a period of ∼11.06686 ms and a dispersion measure of ∼67.44 cm −3 pc. Its spin period is so close to the 10th harmonic of the bright pulsar M15A (∼11.06647 ms) that it was missed in a previous pulsar search. We suggest adding the spectrum in the pulsar candidate diagnostic plot to identify new signals near the harmonics. M15O has the first spin frequency derivative and the second spin frequency derivative, being 1.79191(5) × 10 −14 Hz s −1 and 3.3133(6) × 10 −23 Hz s −2 , respectively. Its projected distance from the optical center of M15 is the closest among all the pulsars in M15. The origin can be something from the center of the massive and core-collapsed globular cluster M15.

Research in Astronomy and AstrophysicsVol. 25(7)
Guizhou University (CN), Chinese Academy of Sciences (CN), National Astronomical Observatories (CN), University of Chinese Academy of Sciences (CN)
National Natural Science Foundation of China, Chinese Academy of Sciences, Youth Innovation Promotion Association, National Astronomical Observatories, Chinese Academy of Sciences, Science and Technology Program of Guizhou Province
Openalex Percentile: Top 19%
Pulsars and Gravitational Waves Research
1.15
DOIOpen Access PDFOpenAlex
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