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Wang, H.; Wen, Z. G.; Duan, X. F.; Wang, Z.; He, D. L.; Wang, H. G.; Wang, N.; Yuan, J. P.; Yan, W. M.; Yuen, R.; Han, W.; Zhi, Q. J.; Xiang, B. B.; Dang, S. J.; Chen, J. L.; Lyu, C. B.; Wang, J. P.; Ergesh, T.
The Astrophysical journal, 06/2023, Volume: 950, Issue: 2Journal Article
Abstract We have carried out a detailed study of polarimetric individual pulse emission from the pulsar J1701−3726 (B1658−37), observed at 1369 MHz using the Parkes 64 m radio telescope. The single-pulse sequences reveal the presence of the three major emission phenomena of pulse nulling, mode changing, and subpulse drifting. Trimodal distribution of the pulse energy is present, implying one population of nulls and two others of emission in the phase window. The mean flux density of the normal mode is almost two times that of the abnormal mode. Our data show that, for PSR J1701−3726, 64% of the time was spent in the normal mode and 12% was in the abnormal mode. The single pulses show the presence of two distinct periodic modulations using a fluctuation spectral analysis. About 24% of the nulls are found to create alternating bunches of nulls and bursts in a quasiperiodic manner with a longer periodicity of 48 ± 4 rotational periods. Additionally, the pulsar presents a steady even–odd modulated feature with a stationary longitude within the pulse window. The ramifications for constraining the viewing geometry and understanding the radio emission mechanisms are discussed.
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