Ling-Xiang Peng

China Astronaut Research and Training Center

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Jun Han

Quanzhou Institute of Equipment Manufacturing Haixi Institute

Junqiang Li

Air Force Medical University

J. L. Han

National Astronomical Observatories

Deyu Tang

South China Agricultural University

Bin Dong

Chinese Academy of Sciences

Chen Wang

University of Chinese Academy of Sciences

Jun Wang

Sichuan University

Ye-Zhao Yu

Qiannan Normal College For Nationalities

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Chinese Academy of Sciences

University of Chinese Academy of Sciences

National Astronomical Observatories

Peking University

Tongji University

Fudan University

Quanzhou Institute of Equipment Manufacturing Haixi Institute

Fujian Institute of Research on the Structure of Matter

Tan Kah Kee Innovation Laboratory

Fujian Normal University

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Jiamusi Pulsar Observations: I. Abnormal emission events of PSR B0919+06

Monthly Notices of the Royal Astronomical Society (2016)

Jun Han J. L. Han Ling-Xiang Peng Deyu Tang Jun Wang

PSR B0919+06 generally radiates radio pulses in a normal phase range. It has been known for its occasional perplexing abnormal emission events wherein individual pulses come to an earlier phase range for a few tens of periods and then returns to its usual phase. Heretofore, only a few such events have been available for study. We observed PSR B0919+06 for about 30 hours using the Jiamusi 66-m telescope at Jiamusi Deep Space Station at S-band, and detected 92 abnormal emission events. We identify four types of events based on the abrupted or gradual phase-shifting of individual pulses. The abnormal emission events are seen to occur randomly some every 1000 to 3000 periods, and they affect the leading edge of the mean profile by up to 2\% in amplitude. The abnormal emission events are probably related to gradual changes of emission processing in the pulsar magnetosphere.

10.1093/mnras/stv2891

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