The Discovery of Three Pulsars in the Globular Cluster M15 with FAST
Abstract We present the discovery of three pulsars in the globular cluster (GC) M15 (NGC 7078) by the Five-hundred-meter Aperture Spherical Radio Telescope. PSR J2129+1210J (M15J) is a millisecond pulsar with a spin period of 11.84 ms and a dispersion measure of 66.68 pc cm −3 . Both PSR J2129+1210K and L (M15K and L) are long-period pulsars with spin periods of 1928 ms and 3961 ms, respectively. M15L is the GC pulsar with the longest spin period known. We update the timing solutions of M15A to M15H. As predicted by A. Ridolfi et al., the flux density of M15C keeps decreasing, and the latest detection in our data set was on 2022 December 20. We have also detected M15I’s signal for the first time since its discovery. Current timing suggests that it is an isolated pulsar.
Authors
- Yu Pan (ORCID: https://orcid.org/0000-0001-7261-8297)
- S. M. Ransom (ORCID: https://orcid.org/0000-0001-5799-9714)
- Yaowei Li (ORCID: https://orcid.org/0000-0003-0725-6108)
- Zhen Yan (ORCID: https://orcid.org/0000-0002-9322-9319)
- Lei Qian (ORCID: https://orcid.org/0000-0003-0597-0957)
- Kuo Liu (ORCID: https://orcid.org/0000-0002-2953-7376)
- Ralph P. Eatough (ORCID: https://orcid.org/0000-0001-6196-4135)
- Dejiang Yin (ORCID: https://orcid.org/0000-0001-6051-3420)
- Baoda Li
- Bojun Wang (ORCID: https://orcid.org/0000-0002-9434-4773)
- P. C. C. Freire (ORCID: https://orcid.org/0000-0003-1307-9435)
- Yuxiao Wu (ORCID: https://orcid.org/0009-0002-3069-1562)
- Tong Liu (ORCID: https://orcid.org/0000-0001-8678-6291)
- Minghui Li (ORCID: https://orcid.org/0000-0003-3233-5473)
- Liyun Zhang (ORCID: https://orcid.org/0000-0002-2394-9521)
- Yinfeng Dai (ORCID: https://orcid.org/0009-0007-6396-7891)
- Yifeng Li (ORCID: https://orcid.org/0009-0002-6994-9276)
- Xinnan Zhang (ORCID: https://orcid.org/0009-0005-7636-9335)
- Zhichen Pan
- Jintao Luo
Institutions
- Chongqing University of Posts and Telecommunications (CN)
- Guizhou University (CN)
- Chinese Academy of Sciences (CN)
- National Radio Astronomy Observatory (US)
- Shanghai Astronomical Observatory (CN)
- National Time Service Center (CN)
- Max Planck Institute for Radio Astronomy (DE)
- National Astronomical Observatories (CN)
- University of Chinese Academy of Sciences (CN)
Publication Details
- Journal
- The Astrophysical Journal Letters
- Published
- 2024-10-01
- DOI
- https://doi.org/10.3847/2041-8213/ad7b9e
- Citations
- 12
- Primary Topic
- Astrophysical Phenomena and Observations
- Type
- article
- Field-Weighted Citation Impact
- 3.98
Funders
- National Science Foundation
- Canadian Institute for Advanced Research
- National Natural Science Foundation of China
- Chinese Academy of Sciences
- Youth Innovation Promotion Association of the Chinese Academy of Sciences
- Natural Science Foundation of Chongqing
- Youth Innovation Promotion Association