Vol 21, No 10 (2021) / Wang

An Arecibo follow-up study of seven pulsars discovered by Five-hundred-meter Aperture Spherical radio Telescope (FAST)

Shen Wang, Wei-Wei Zhu, Di Li, Zhi-Chen Pan, Pei Wang, James M. Cordes, Shami Chatterjee, Ju-Mei Yao, Lei Qian, You-Ling Yue, Lei Zhang, Ru-Shuang Zhao, Shuang-Qiang Wang, Jia-Rui Niu, Mao Yuan, Chen-Chen Miao, Xiao-Yao Xie, Zhi-Jie Liu, Xu-Hong Yu, Shan-Ping You, Ling-Qi Meng, and FAST Collaboration

Abstract

We present Arecibo 327 MHz confirmation and follow-up studies of seven new pulsars discovered by the Five-hundred-meter Aperture Spherical radio Telescope (FAST). These pulsars are discovered in a pilot program of the Commensal Radio Astronomy FAST Survey (CRAFTS) with the ultra-widebandwidth commissioning receiver. Five of them are normal pulsars and two are extreme nulling slow pulsars. PSR J2111+2132’s dispersion measure (DM: 78.5 pc cm−3) is above the upper limits of the two Galactic free electron density models, NE2001 and YMW16, and PSR J2057+2133’s position is out of the Scutum-Crux Arm, making them uniquely useful for improving the Galactic free electron density model in their directions. We present a detailed single pulse analysis for the slow nulling pulsars. We show evidence that PSR J2323+1214’s main pulse component follows a non-Poisson distribution and marginal evidence for a sub-pulse-drift or recurrent period of 32.3±0.4 rotations from PSR J0539+0013. We discuss the implication of our finding to the pulsar radiation mechanism.

Keywords


methods: observational, pulsars: general, stars: neutron

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DOI: https://doi.org/10.1088/1674-4527/21/10/251

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