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Peer-reviewedCC BY 4.0The Astrophysical Journal

A Massive and Eccentric Binary Millisecond Pulsar in the Globular Cluster M10

  • Yujie Wang1,2
  • Zhongli Zhang1,2
  • Zhichen Pan3,4,2
  • Lei Qian3,4,2
  • Lijing Shao5,3
  • Dejiang Yin4
  • Yujie Lian6
6 affiliations
  1. 1State Key Laboratory of Radio Astronomy and Technology
  2. 2University of Chinese Academy of Sciences
  3. 3Chinese Academy of Sciences
  4. 4Guizhou University
  5. 5Peking University
  6. 6Beijing Normal University
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Abstract

We present the timing solution of the millisecond pulsar PSR J1657−0406A in the globular cluster M10, based on observations performed with the Five-hundred-meter Aperture Spherical radio Telescope (FAST). The timing results show that PSR J1657−0406A is in a long-period ( P b ∼ 37 days) and eccentric ( e ∼ 0.12) orbit. We also measured the periastron advance ω ̇ = 0.00090 ( 13 ) deg yr ⁻¹ , which implies a total system mass of 2.5(6) M ⊙ by assuming that general relativity accurately models the orbital motion. No optical counterpart was detected within the positional uncertainty, indicating that the companion is unlikely to be a main-sequence star. Considering possible formation channels for the orbital eccentricity, we favor a helium white dwarf companion, although a massive white dwarf or neutron star cannot be completely excluded.

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Cite

BibTeXRIS
BibTeX
@article{wang2026massive,
  title = {{A Massive and Eccentric Binary Millisecond Pulsar in the Globular Cluster M10}},
  author = {Yujie Wang and Zhongli Zhang and Zhichen Pan and Lei Qian and Lijing Shao and Dejiang Yin and Yujie Lian},
  journal = {The Astrophysical Journal},
  year = {2026},
  month = oct,
  doi = {10.3847/1538-4357/aea6af},
  url = {https://iopscience.iop.org/article/10.3847/1538-4357/aea6af},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - A Massive and Eccentric Binary Millisecond Pulsar in the Globular Cluster M10
AU  - Yujie Wang
AU  - Zhongli Zhang
AU  - Zhichen Pan
AU  - Lei Qian
AU  - Lijing Shao
AU  - Dejiang Yin
AU  - Yujie Lian
PY  - 2026
DA  - 2026/10/29
JO  - The Astrophysical Journal
DO  - 10.3847/1538-4357/aea6af
UR  - https://iopscience.iop.org/article/10.3847/1538-4357/aea6af
AB  - We present the timing solution of the millisecond pulsar PSR J1657−0406A in the globular cluster M10, based on observations performed with the Five-hundred-meter Aperture Spherical radio Telescope (FAST). The timing results show that PSR J1657−0406A is in a long-period ( P b ∼ 37 days) and eccentric ( e ∼ 0.12) orbit. We also measured the periastron advance ω ̇ = 0.00090 ( 13 ) deg yr ⁻¹ , which implies a total system mass of 2.5(6) M ⊙ by assuming that general relativity accurately models the orbital motion. No optical counterpart was detected within the positional uncertainty, indicating that the companion is unlikely to be a main-sequence star. Considering possible formation channels for the orbital eccentricity, we favor a helium white dwarf companion, although a massive white dwarf or neutron star cannot be completely excluded.
SN  - 1538-4357
SN  - 0004-637X
ER  -