FAST ultra-wideband observation of abnormal emission-shift events of PSR B0919+06
文献类型：期刊论文
| 作者 | Yu, Ye-Zhao1,2; Peng, Bo2 ; Liu, Kuo2,3; Zhang, ChengMin2; Wang, Lin1,2; Kou, FeiFei2; Lu, JiGuang2; Yu, Meng2
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| 刊名 | SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
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| 出版日期 | 2019-05-01 |
| 卷号 | 62期号:5页码:6 |
| 关键词 | pulsar B0919+06 radio |
| ISSN号 | 1674-7348 |
| DOI | 10.1007/s11433-018-9358-8 |
| 英文摘要 | PSR B0919+06 is known for its abnormal emission phenomenon, where the pulse emission window occasionally shifts progressively in longitude and returns afterwards. The physical mechanism behind this phenomenon is still under investigation. In this paper, we present our ultra-wideband observation of this pulsar using the Five-hundred-meter Aperture Spherical radio Telescope (FAST), with simultaneous measurements in the frequency ranges 280-780 and 1250-1550 MHz. We have identified three abnormal events, each of which becomes less apparent as the frequency decreases. At 1400 MHz, the averaged profile slightly shifted after the first and third abnormal events, implying a relationship between abnormal event and profile variation. We also found a linear trend in the left-edge position of the averaged profiles between the first and third events as well as after the third event, suggesting the existence of a slow-drifting mode between the two major events. The second event has a comparatively small shift in phase and is thus categorized as a "small flare state". During the third event, a sequence of approximately nine pulses was seen to significantly weaken in all frequency bands, likely associated with the pseudo-nulling observed at 150 MHz. A three-component de-composition analysis of the normal averaged profiles shows that the trailing component is dominant at our observing frequencies, while the centre component has a comparatively steeper spectrum. We found the overall flux density in an abnormal event to slightly differ from that in an ordinary state, and the difference shows a frequency dependence. A comparison of the normal, abnormal and dimmed averaged profile indicates that the leading component is likely to be stable in all states. |
| WOS关键词 | SUBPULSE MODULATION ; PULSARS ; PROFILE |
| 资助项目 | National Natural Science Foundation of China[11673031] ; National Natural Science Foundation of China[11703048] ; National Natural Science Foundation of China[U1731238] ; Open Project Program of the Key Laboratory of FAST, NAOC ; European Research Council[610058] ; FAST FELLOWSHIP from Special Funding for Advanced Users ; MPG-CAS Joint Project "Low-Frequency Gravitational Wave Astronomy and Gravitational Physics in Space" |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000462232700001 |
| 出版者 | SCIENCE PRESS |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; Open Project Program of the Key Laboratory of FAST, NAOC ; Open Project Program of the Key Laboratory of FAST, NAOC ; European Research Council ; European Research Council ; FAST FELLOWSHIP from Special Funding for Advanced Users ; FAST FELLOWSHIP from Special Funding for Advanced Users ; MPG-CAS Joint Project "Low-Frequency Gravitational Wave Astronomy and Gravitational Physics in Space" ; MPG-CAS Joint Project "Low-Frequency Gravitational Wave Astronomy and Gravitational Physics in Space" ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Open Project Program of the Key Laboratory of FAST, NAOC ; Open Project Program of the Key Laboratory of FAST, NAOC ; European Research Council ; European Research Council ; FAST FELLOWSHIP from Special Funding for Advanced Users ; FAST FELLOWSHIP from Special Funding for Advanced Users ; MPG-CAS Joint Project "Low-Frequency Gravitational Wave Astronomy and Gravitational Physics in Space" ; MPG-CAS Joint Project "Low-Frequency Gravitational Wave Astronomy and Gravitational Physics in Space" ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Open Project Program of the Key Laboratory of FAST, NAOC ; Open Project Program of the Key Laboratory of FAST, NAOC ; European Research Council ; European Research Council ; FAST FELLOWSHIP from Special Funding for Advanced Users ; FAST FELLOWSHIP from Special Funding for Advanced Users ; MPG-CAS Joint Project "Low-Frequency Gravitational Wave Astronomy and Gravitational Physics in Space" ; MPG-CAS Joint Project "Low-Frequency Gravitational Wave Astronomy and Gravitational Physics in Space" ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Open Project Program of the Key Laboratory of FAST, NAOC ; Open Project Program of the Key Laboratory of FAST, NAOC ; European Research Council ; European Research Council ; FAST FELLOWSHIP from Special Funding for Advanced Users ; FAST FELLOWSHIP from Special Funding for Advanced Users ; MPG-CAS Joint Project "Low-Frequency Gravitational Wave Astronomy and Gravitational Physics in Space" ; MPG-CAS Joint Project "Low-Frequency Gravitational Wave Astronomy and Gravitational Physics in Space" |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/25720]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Yu, Ye-Zhao; Peng, Bo |
| 作者单位 | 1.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, CAS Key Lab FAST, Natl Astron Observ, Beijing 100101, Peoples R China 3.Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany |
| 推荐引用方式 GB/T 7714 | Yu, Ye-Zhao,Peng, Bo,Liu, Kuo,et al. FAST ultra-wideband observation of abnormal emission-shift events of PSR B0919+06[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2019,62(5):6. |
| APA | Yu, Ye-Zhao.,Peng, Bo.,Liu, Kuo.,Zhang, ChengMin.,Wang, Lin.,...&Yu, Meng.(2019).FAST ultra-wideband observation of abnormal emission-shift events of PSR B0919+06.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,62(5),6. |
| MLA | Yu, Ye-Zhao,et al."FAST ultra-wideband observation of abnormal emission-shift events of PSR B0919+06".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 62.5(2019):6. |
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来源：国家天文台
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