Jiamusi Pulsar Observations: I. Abnormal emission events of PSR B0919+06. Issue 4 (9th January 2016)

• Record Type: Journal Article
• Authors: Han, Jun; Han, J. L.; Peng, Ling-Xiang; Tang, De-Yu; Wang, Jun; Li, Jun-Qiang; Wang, Chen; Yu, Ye-Zhao; Dong, Bin
• Is Part Of: Monthly notices of the Royal Astronomical Society. Volume 456:Issue 4(2016)
• Page Start: 3413
• Page End: 3421
• Publication Date: 2016-01-09
• Subjects: pulsars: general -- pulsars: individual: PSR B0919+06; Astronomy -- Periodicals; Periodicals; 520.5
• DOI: 10.1093/mnras/stv2891
• Languages: English
• ISSNs: 0035-8711

Abstract

Abstract: PSR B0919+06 generally radiates radio pulses in a normal phase range. It is 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 it returns to its usual phase. Heretofore, only a few such events have been available for study. We observed PSR B0919+06 for about 30 h using the Jiamusi 66-m telescope at the Jiamusi Deep Space Station at the S band, and we 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 about every 1000–3000 periods, and they affect the leading edge of the mean profile by up to 2 per cent in amplitude. The abnormal emission events are probably related to gradual changes of emission processing in the pulsar magnetosphere.