Journal
ASTROPHYSICAL JOURNAL
Volume 900, Issue 2, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.3847/1538-4357/abaab7
Keywords
Pulsars
Categories
Funding
- West Light Foundation of Chinese Academy of Sciences (WLFC) [2016-QNXZ-B-24]
- Chinese National Science Foundation [U1838109, U1731238, U1831102, U1631106, 11873080]
- National Basic Research Program of China (973 Program) [2015CB857100]
- prospective project of the Astronomical Research Center of the Chinese Academy of Sciences
- National Program on Key Research and Development Project [2016YFA0400804]
- Xinjiang uygur autonomous region of China
- Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi [2019L0863]
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We report on the discovery of drifting subpulses from the Vela pulsar, observed using the Yunnan 40 m radio telescope at 6800 MHz observing frequency. The single pulses show the presence of two distinct drifting patterns, where the central component is modulated in longitude and amplitude simultaneously with a period of 9 pulses, and the trailing component remains phase stationary within the pulse window but periodically changes in intensity with a period of 29 pulses. The leading component emission remains constant in intensity and pulse phase. Such periodic modulation in the Vela pulsar is a separate phenomenon from periodic nulling and traditional subpulse drifting, which may lead to a greater understanding of the pulse emission mechanism.
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