Abstract
We report on the short timescale intensity fluctuations of PSR B1133+16 and PSR B1237+25 due to scintillation at 1.54 GHz. The structure functions of intensity fluctuations are constructed and the linear fittings are applied to the structure regime in log–log plots to get the slope values. The slope of the SFs for PSR B1237+25 are less than that of PSR B1133+16, and both of them are much less than 2. For PSR B1133+16, the slope values agree very well with a Kolmogorov spectrum predicted value 5/3, whereas PSR B1237+25 not. We investigate the dynamic spectrum and obtain its auto-correlation function (ACF). Scintillation parameters are obtained by fitting to the autocorrelation function of the dynamic spectrum. The observed diffractive interstellar scintillation (DISS) timescales agree well with the observations and are consistent with some expected values, but the observed de-correlation frequency bandwidths are much less than predicted ones. The expected refractive interstellar scintillation (RISS) timescales are also estimated by using our derived diffractive scintillation parameters. They are consistent with the timescales of slow pulse intensity fluctuations. We proposed that the short timescale of pulse intensity variations caused by the DISS are modulated by the slow variations due to the effects of RISS.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Armstrong, J.W., Rickett, B.J., Spangler, S.R.: Astrophys. J. 443, 209 (1995)
Bhat, N.D.R., Rao, A.P., Gupta, Y.: Astrophys. J. Suppl. Ser. 121, 483 (1999). arXiv:astro-ph/9810354
Bignall, H.E., Jauncey, D.L., Lovell, J., Macquart, J.-P., Kedziora-Chudczer, L., Tzioumis, A.K.: In: IAU Joint Discussion, vol. 18 (2003)
Coleman, T.F., Li, Y.: Math. Program. 67(1–3), 189 (1994)
Coleman, T.F., Li, Y.: SIAM J. Optim. 6(2), 418 (1996)
Cordes, J.M.: Astrophys. J. 311, 183 (1986)
Cordes, J.M., Lazio, T.J.: Astrophys. J. 376, 123 (1991)
Cordes, J.M., Rickett, B.J.: Astrophys. J. 507, 846 (1998)
Cordes, J.M., Weisberg, J.M., Boriakoff, V.: Astrophys. J. 288, 221 (1985)
Gupta, Y.: Astrophys. J. 451, 717 (1995)
Jauncey, D.L., et al.: In: Proc. of the VSOP Symp., held at the Institute of Space and Astronautical Science, Sagamihara, Kanagawa, Japan, January 2000, p. 147 (2000)
Kramer, M., Karastergiou, A., Gupta, Y., Johnston, S., Bhat, N.D.R., Lyne, A.G.: Astron. Astrophys. 407, 655 (2003). arXiv:astro-ph/0306455
Lee, L.C., Jokipii, J.R.: Astrophys. J. 202, 439 (1975)
Lovell, J.E.J., Jauncey, D.L., Bignall, H.E., Kedziora-Chudczer, L., Macquart, J.-P., Rickett, B.J., Tzioumis, A.K.: Astron. J. 126, 1699 (2003). arXiv:astro-ph/0306484
Macquart, J.-P., de Bruyn, A.G.: Astron. Astrophys. 446, 185 (2006). arXiv:astro-ph/0510495
Malofeev, V.M., Shishov, V.I., Sieber, W., Jessner, A., Kramer, M., Wielebinski, R.: Astron. Astrophys. 308, 180 (1996)
Narayan, R.B.R.: In: Kayser, R., Schramm, T., Nieser, L. (eds.) Gravitational Lenses. Lecture Notes in Physics, vol. 406, p. 264. Springer, Berlin (1992)
Rickett, B.: Astrophys. Space Sci. 278, 5 (2001)
Rickett, B.: Publ. Astron. Soc. Aust. 19, 100 (2002)
Rickett, B.J.: Annu. Rev. Astron. Astrophys. 28, 561 (1990)
Shishov, V.I., Smirnova, T.V., Sieber, W., Malofeev, V.M., Potapov, V.A., Stinebring, D., Kramer, M., Jessner, A., Wielebinski, R.: Astron. Astrophys. 404, 557 (2003)
Simonetti, J.H., Cordes, J.M., Heeschen, D.S.: Astrophys. J. 296, 46 (1985)
Smith, F.G., Wright, N.C.: Mon. Not. R. Astron. Soc. 214, 97 (1985)
Wang, N., Manchester, R.N., Zhang, J., Wu, X.J., Yusup, A., Lyne, A.G., Cheng, K.S., Chen, M.Z.: Mon. Not. R. Astron. Soc. 328, 855 (2001). arXiv:astro-ph/0111006
Wang, N., Manchester, R.N., Johnston, S., Rickett, B., Zhang, J., Yusup, A., Chen, M.: Mon. Not. R. Astron. Soc. 358, 270 (2005). arXiv:astro-ph/0501218
Wang, N., Yan, Z., Manchester, R.N., Wang, H.X.: Mon. Not. R. Astron. Soc. 385, 1393 (2008). arXiv:0706.3448
Wolszczan, A., Cordes, J.M.: Astrophys. J. Lett. 320, 35 (1987)
Acknowledgements
We are very grateful to the members of Pulsar Group at Xinjiang Astronomical Observatory for very constructive discussions, and the engineers of Nanshan for maintaining the observation system. We also thank Dr. Zhi-Fu Gao for his help in improving the presentation. This work was funded by the National Natural Science Foundation of China (NSFC) under No. 11273051 and the key program project of Joint Fund of Astronomy by NSFC and CAS under No. 11178001.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Niu, H.B., Esamdin, A. & Wang, N. Short timescale intensity fluctuations of PSR B1133+16 and PSR B1237+25 due to interstellar scintillation at 1.54 GHz. Astrophys Space Sci 347, 327–335 (2013). https://doi.org/10.1007/s10509-013-1518-y
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10509-013-1518-y