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arXiv · 2502.20865

Discovery of 15 new pulsars at high Galactic Latitudes with FAST

Xin Xu·Shi Dai·Qijun Zhi·Juntao Bai·Joanna Berteaud·Francesca Calore·Maïca Clavel·Weiwei Zhu·Di Li·Rushuang Zhao·Renxin Xu·Guojun Qiao
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Abstract

We present the discovery and timing results of 15 pulsars discovered in a high Galactic latitude survey conducted with the Five-hundred-meter Aperture Spherical Telescope (FAST). The survey targeted a region as close as possible to the Galactic Center, encompassing an area near the Galactic Bulge. The newly discovered pulsars consist of eleven normal pulsars and four millisecond pulsars (MSPs). Among the MSPs, three are identified in binary systems with orbital periods of ~3.1, 4.6 and 12.5 days, respectively. We have successfully obtained coherent timing solutions for three of the normal pulsars (PSRs J1745-0059, J1746-0156 and J1800-0059). Furthermore, within our data set we found that four pulsars (three new and one known) show mode-changing and/or subpulse drifting phenomena. Comparing our discoveries with simulations of the Galactic disk and Bulge MSP populations indicates that these new pulsars are most likely located in the disk. Nonetheless, our discoveries demonstrate that deep surveys at high Galactic latitudes have significant potential to enhance our understanding of the MSP population in the direction of the Bulge.

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Xin Xu, Shi Dai, Qijun Zhi, Juntao Bai, Joanna Berteaud, Francesca Calore, Maïca Clavel, Weiwei Zhu, Di Li, Rushuang Zhao, Renxin Xu, Guojun Qiao. 2025-02-28. Discovery of 15 new pulsars at high Galactic Latitudes with FAST. https://arxiv.org/abs/2502.20865

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