Skip to main content

FAST ultra-wideband observation of abnormal emission-shift events of PSR B0919+06

Abstract

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.

This is a preview of subscription content, access via your institution.

References

  1. D. C. Backer, Nature 227, 692 (1970).

    ADS  Article  Google Scholar 

  2. P. Weltevrede, R. T. Edwards, and B. W. Stappers, Astron. Astrophys. 445, 243 (2006).

    ADS  Article  Google Scholar 

  3. P. Weltevrede, B. W. Stappers, and R. T. Edwards, Astron. Astrophys. 469, 607 (2007), arXiv: 0704.3572.

    ADS  Article  Google Scholar 

  4. D. C. Backer, Nature 228, 42 (1970).

    ADS  Article  Google Scholar 

  5. J. D. Biggs, Astrophys. J. 394, 574 (1992).

    ADS  Article  Google Scholar 

  6. N. Wang, R. N. Manchester, and S. Johnston, Mon. Not. R. Astron. Soc. 377, 1383 (2007).

    ADS  Article  Google Scholar 

  7. D. C. Backer, Nature 228, 1297 (1970).

    ADS  Article  Google Scholar 

  8. N. Bartel, D. Morris, W. Sieber, and T. H. Hankins, Astrophys. J. 258, 776 (1982).

    ADS  Article  Google Scholar 

  9. J. M. Rankin, C. Rodriguez, and G. A. E. Wright, Mon. Not. R. Astron. Soc. 370, 673 (2006).

    ADS  Article  Google Scholar 

  10. T. V. Shabanova, V. D. Pugachev, and K. A. Lapaev, Astrophys. J. 775, 2 (2013), arXiv: 1307.0297.

    ADS  Article  Google Scholar 

  11. K. Stovall, P. S. Ray, J. Blythe, J. Dowell, T. Eftekhari, A. Garcia, T. J. W. Lazio, M. McCrackan, F. K. Schinzel, and G. B. Taylor, Astrophys. J. 808, 156 (2015), arXiv: 1410.7422.

    ADS  Article  Google Scholar 

  12. T. H. Hankins, and J. M. Rankin, Astron. J. 139, 168 (2010).

    ADS  Article  Google Scholar 

  13. S. Johnston, A. Karastergiou, D. Mitra, and Y. Gupta, Mon. Not. R. Astron. Soc. 388, 261 (2008), arXiv: 0804.3838.

    ADS  Article  Google Scholar 

  14. B. B. P. Perera, B. W. Stappers, P. Weltevrede, A. G. Lyne, and C. G. Bassa, Mon. Not. R. Astron. Soc. 446, 1380 (2015), arXiv: 1410.5228.

    ADS  Article  Google Scholar 

  15. J. Han, J. L. Han, L. X. Peng, D. Y. Tang, J. Wang, J. Q. Li, C. Wang, Y. Z. Yu, and B. Dong, Mon. Not. R. Astron. Soc. 456, 3413 (2016), arXiv: 1601.02889.

    ADS  Article  Google Scholar 

  16. H. M. Wahl, D. J. Orfeo, J. M. Rankin, and J. M. Weisberg, Mon. Not. R. Astron. Soc. 461, 3740 (2016), arXiv: 1607.01737.

    ADS  Article  Google Scholar 

  17. G. Shaifullah, C. Tiburzi, S. Oslowski, J. P. W. Verbiest, A. Szary, J. KünsemÖller, A. Horneffer, J. Anderson, M. Kramer, D. J. Schwarz, G. Mann, M. Steinmetz, and C. Vocks, Mon. Not. R. Astron. Soc.-Lett. 477, L25 (2018), arXiv: 1803.08822.

  18. B. Peng, R. Nan, Y. Su, Y. Qiu, L. Zhu, and W. Zhu, Int. Astron. Union Colloquium 182, 219 (2001).

    Article  Google Scholar 

  19. R. Nan, Sci China Ser G-Phys. Mech. Astron. 49, 129 (2006).

    ADS  Article  Google Scholar 

  20. P. Jiang, Y. L. Yue, H. Q. Gan, R. Yao, H. Li, G. F. Pan, J. H. Sun, D. J. Yu, H. F. Liu, N. Y. Tang, L. Qian, J. G. Lu, J. Yan, B. Peng, S. X. Zhang, Q. M. Wang, Q. Li, D. Li, and FAST Collaboration, Sci. China-Phys. Mech. Astron. 62, 959502 (2019).

    Article  Google Scholar 

  21. A.W. Hotan, W. van Straten, and R. N. Manchester, Publ. Astron. Soc. Aust. 21, 302 (2004).

    ADS  Article  Google Scholar 

  22. W. van Straten, and M. Bailes, Publ. Astron. Soc. Aust. 28, 1 (2011), arXiv: 1008.3973.

    ADS  Article  Google Scholar 

  23. R. Yuen, and D. B. Melrose, Mon. Not. R. Astron. Soc. 469, 2049 (2017).

    ADS  Article  Google Scholar 

  24. B. P. Gong, Y. P. Li, J. P. Yuan, J. Tian, Y. Y. Zhang, D. Li, B. Jiang, X. D. Li, H. G. Wang, Y. C. Zou, and L. J. Shao, Astrophys. J. 855, 35 (2018).

    ADS  Article  Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Consortia

Corresponding authors

Correspondence to Ye-Zhao Yu or Bo Peng.

Rights and permissions

Reprints and Permissions

About this article

Verify currency and authenticity via CrossMark

Cite this article

Yu, YZ., Peng, B., Liu, K. et al. FAST ultra-wideband observation of abnormal emission-shift events of PSR B0919+06. Sci. China Phys. Mech. Astron. 62, 959504 (2019). https://doi.org/10.1007/s11433-018-9358-8

Download citation

  • Received:

  • Accepted:

  • Published:

  • DOI: https://doi.org/10.1007/s11433-018-9358-8

Keywords

  • pulsar
  • B0919+06
  • radio