Discovery and timing of pulsars in the globular cluster M13 with FAST

Lin Wang, Bo Peng, Benjamin Stappers, Kuo Liu, Michael Keith, Andrew Lyne, Jiguang Lu, Ye-Zhao Yu, FeiFei Kou, Jun Yan, Peng Jiang, Chengjin Jin, Di Li, Qi Li, Lei Qian, Qiming Wang, Youling Yue, Haiyan Zhang, Shuxin Zhang, Yan Zhu

Research output: Contribution to journalArticlepeer-review


We report the discovery of a binary millisecond pulsar (namely PSR J1641+3627F or M13F) in the globular cluster M13 (NGC 6205) and timing solutions of M13A to F using observations made with the Five-hundred-metre Aperture Spherical radio Telescope (FAST). PSR J1641+3627F has a spin period of 3.00 ms and an orbital period of 1.4 days. The most likely companion mass is 0.16 M. M13A to E all have short spin periods and small period derivatives. We also confirm that the binary millisecond pulsar PSR J1641+3627E (also M13E) is a black widow with a companion mass around 0.02 M. We find that all the binary systems have low eccentricities compared to those typical for globular cluster pulsars and that they decrease with distance from the cluster core. This is consistent with what is expected as this cluster has a very low encounter rate per binary.
Original languageEnglish
JournalThe Astrophysical Journal
Publication statusAccepted/In press - 13 Feb 2020


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