2026-10-14T20:36:36Z https://www.scidb.cn/oai

10.57760/sciencedb.32449 2025-11-28T21:36:57Z

2025-11-28 Multi-Faceted Emission Properties of PSR J2129+4119 Observed with FAST doi:10.57760/sciencedb.32449 en We present a detailed single-pulse study of the long-period pulsar PSR J2129+4119 using high-sensitivity FAST observations. Despite locating well below the traditional death line, the pulsar exhibits sustained and multi-modal emission behavior, including nulls, weak pulses, regular emission, and occasional bright pulses. The nulling fraction is measured to be 8.13% +/- 0.51%, with null durations typically under four pulse periods. Fluctuation spectral analysis reveals both phase-modulated subpulse drifting and intermittent beat-like modulation. At the same time, polarization profiles show high linear polarization and stable polarization position angle (PPA) swings consistent with a near-tangential sightline geometry. Quasi-periodic microstructures are detected in 11.54% of regular pulses, with a mean periodicity and width of 4.57 ms and 4.30 ms, respectively. A well-defined scintillation arc in the secondary spectrum confirms the presence of a localized scattering screen. These results indicate that PSR J2129+4119 remains magnetospherically active and coherently emitting despite its low energy loss rate, offering key insights into pulsar emission physics near the death line. FAST; PSR J2129+4119; pulsar emission Habtamu Menberu Tedila Di Li Pei Wang Rai Yuen Ziwei Wu Shijun Dang Jianping Yuan Na Wang Marilyn Cruces Shuojun Zhang Juntao Bai De Zhao PUBLIC https://creativecommons.org/licenses/by/4.0/ dataset Science Data Bank