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

Michilli D, Hessels JWT, Donner J, Grießmeier J-M, Serylak M, Shaw B, Stappers BW, Verbiest J, Deller AT, Driessen LN, Stinebring DR, et al. (2018)
Proceedings of the International Astronomical Union 13(S337): 291-294.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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DOI
Autor*in
Michilli, D.; Hessels, J. W. T.; Donner, JulianUniBi; Grießmeier, J.-M.; Serylak, M.; Shaw, B.; Stappers, B. W.; Verbiest, JorisUniBi ; Deller, A. T.; Driessen, L. N.; Stinebring, D. R.; Bondonneau, L.
Alle
Einrichtung
Fakultät für Physik > AG Radioastronomie
Abstract / Bemerkung
AbstractAn 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.
Stichworte
Astronomy and Astrophysics
Erscheinungsjahr
2018
Zeitschriftentitel
Proceedings of the International Astronomical Union
Band
13
Ausgabe
S337
Seite(n)
291-294
ISSN
1743-9213
eISSN
1743-9221
Page URI
https://pub.uni-bielefeld.de/record/2944856

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Michilli D, Hessels JWT, Donner J, et al. Evolution of the low-frequency pulse profile of PSR B2217+47. Proceedings of the International Astronomical Union. 2018;13(S337):291-294.
Michilli, D., Hessels, J. W. T., Donner, J., Grießmeier, J. - M., Serylak, M., Shaw, B., Stappers, B. W., et al. (2018). Evolution of the low-frequency pulse profile of PSR B2217+47. Proceedings of the International Astronomical Union, 13(S337), 291-294. doi:10.1017/s1743921317010006
Michilli, D., Hessels, J. W. T., Donner, Julian, Grießmeier, J.-M., Serylak, M., Shaw, B., Stappers, B. W., et al. 2018. “Evolution of the low-frequency pulse profile of PSR B2217+47”. Proceedings of the International Astronomical Union 13 (S337): 291-294.
Michilli, D., Hessels, J. W. T., Donner, J., Grießmeier, J. - M., Serylak, M., Shaw, B., Stappers, B. W., Verbiest, J., Deller, A. T., Driessen, L. N., et al. (2018). Evolution of the low-frequency pulse profile of PSR B2217+47. Proceedings of the International Astronomical Union 13, 291-294.
Michilli, D., et al., 2018. Evolution of the low-frequency pulse profile of PSR B2217+47. Proceedings of the International Astronomical Union, 13(S337), p 291-294.
D. Michilli, et al., “Evolution of the low-frequency pulse profile of PSR B2217+47”, Proceedings of the International Astronomical Union, vol. 13, 2018, pp. 291-294.
Michilli, D., Hessels, J.W.T., Donner, J., Grießmeier, J.-M., Serylak, M., Shaw, B., Stappers, B.W., Verbiest, J., Deller, A.T., Driessen, L.N., Stinebring, D.R., Bondonneau, L., Geyer, M., Hoeft, M., Karastergiou, A., Kramer, M., Osłowski, S., Pilia, M., Sanidas, S., Weltevrede, P.: Evolution of the low-frequency pulse profile of PSR B2217+47. Proceedings of the International Astronomical Union. 13, 291-294 (2018).
Michilli, D., Hessels, J. W. T., Donner, Julian, Grießmeier, J.-M., Serylak, M., Shaw, B., Stappers, B. W., Verbiest, Joris, Deller, A. T., Driessen, L. N., Stinebring, D. R., Bondonneau, L., Geyer, M., Hoeft, M., Karastergiou, A., Kramer, M., Osłowski, S., Pilia, M., Sanidas, S., and Weltevrede, P. “Evolution of the low-frequency pulse profile of PSR B2217+47”. Proceedings of the International Astronomical Union 13.S337 (2018): 291-294.
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