Skip to main content

Evolution of the low-frequency pulse profile of PSR B2217+47

  • D. Michilli (a1) (a2), J. W. T. Hessels (a1) (a2), J. Y. Donner (a3), J.-M. Grießmeier (a4) (a5), M. Serylak (a6) (a7), B. Shaw (a8), B. W. Stappers (a8), J. P. W. Verbiest (a3) (a9), A. T. Deller (a10), L. N. Driessen (a1) (a8), D. R. Stinebring (a11), L. Bondonneau (a4), M. Geyer (a12), M. Hoeft (a13), A. Karastergiou (a6) (a12) (a14), M. Kramer (a8) (a9), S. Osłowski (a10), M. Pilia (a2) (a15), S. Sanidas (a1) and P. Weltevrede (a8)...

An evolution of the low-frequency pulse profile of PSR B2217+47 is observed during a six-year observing campaign with the LOFAR telescope at 150 MHz. The evolution is manifested as a new component in the profile trailing the main peak. The leading part of the profile, including a newly-observed weak component, is steady during the campaign. The transient component is not visible in simultaneous observations at 1500 MHz using the Lovell telescope, implying a chromatic effect. A variation in the dispersion measure of the source is detected in the same timespan. Precession of the pulsar and changes in the magnetosphere are investigated to explain the profile evolution. However, the listed properties favour a model based on turbulence in the interstellar medium (ISM). This interpretation is confirmed by a strong correlation between the intensity of the transient component and main peak in single pulses. Since PSR B2217+47 is the fourth brightest pulsar visible to LOFAR, we speculate that ISM-induced pulse profile evolution might be relatively common but subtle and that SKA-Low will detect many similar examples. In this scenario, similar studies of pulse profile evolution could be used in parallel with scintillation arcs to characterize the properties of the ISM.

Hide All
Ahuja, A. L., Gupta, Y., Mitra, D., Kembhavi, A. K., 2005, MRAS, 357, 1013
Backer, D. C., Wong, T., Valanju, J., 2000, ApJ, 543, 740
Bilous, A. V., et al., 2016, A&A, 591, A134
Brook, P. R., Karastergiou, A., Buchner, S., Roberts, S. J., Keith, M. J., Johnston, S., & Shannon, R. M., 2014, ApJL, 780, L31
Brook, P. R., Karastergiou, A., Johnston, S., Kerr, M., Shannon, R. M., & Roberts, S. J., 2016, MRAS, 456, 1374
Cordes, J. M., 1993, in Phillips, J. A., Thorsett, S. E., & Kulkarni, S. R., eds, Astronomical Society of the Pacific Conference Series Vol. 36, Planets Around Pulsars. pp 43–60
Damour, T. & Ruffini, R., 1974, Academie des Sciences Paris Comptes Rendus Serie Sciences Mathematiques 279, 971
Edwards, R. T., Hobbs, G. B., & Manchester, R. N., 2006, MRAS, 372, 1549
Helfand, D. J., Manchester, R. N., & Taylor, J. H., 1975, ApJ, 198, 661
Karastergiou, A., Roberts, S. J., Johnston, S., Lee, H., Weltevrede, P., & Kramer, M., 2011, MRAS, 415, 251
Kramer, M., Lyne, A. G., O’Brien, J. T., Jordan, C. A., & Lorimer, D. R., 2006, Science, 12, 549
Lyne, A. G., Pritchard, R. S., & Graham-Smith, F., 2001, MRAS, 321, 67
Lyne, A., Hobbs, G., Kramer, M., Stairs, I., & Stappers, B., 2010, Science, 329, 408
Pilia, M., et al., 2016, A&A, 586, A92
Stairs, I. H., Lyne, A. G., & Shemar, S. L., 2000, Nature, 406, 484
Stappers, B. W., et al., 2011, A&A, 530, A80
Stinebring, D. R., McLaughlin, M. A., Cordes, J. M., Becker, K. M., Goodman, J. E. E., Kramer, M. A., Sheckard, J. L., & Smith, C. T., 2001, ApJL, 549, L97
Suleymanova, S. A. & Shitov, Y. P., 1994, ApJL, 422, L17
van Haarlem, M. P., et al., 2013, A&A, 556, A2
Weisberg, J. M., Romani, R. W., & Taylor, J. H., 1989, ApJ, 347, 1030
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Proceedings of the International Astronomical Union
  • ISSN: 1743-9213
  • EISSN: 1743-9221
  • URL: /core/journals/proceedings-of-the-international-astronomical-union
Please enter your name
Please enter a valid email address
Who would you like to send this to? *



Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed