Abstract
A replot of period derivative against period is done for about 300 pulsars, and the main features of the plot are discussed. The significance of a ‘gap’ in this plot is reexamined and the existence of pulsars with nulling and subpulse drifting behaviour below this ‘gap’ is pointed out. The implications of this for pulsar evolution are also discussed.
Similar content being viewed by others
References
Backer, D. C.: 1970,Nature 228, 42.
Backer, D. C.: 1973,Astrophys. J. 182, 245.
Drake, F. D. and Craft, H. D.: 1968,Nature 220, 231.
Ferguson, D. C.: 1979,Astron. J. 84, 621.
Hesse, K. H. and Wielebinsiki, R.: 1974,Astron. Astrophys. 31, 409.
Huguenin, G. R., Taylor, J. H., and Troland, T. H.: 1970,Astrophys. J. 162, 727.
Lyne, A. G. et al.: 1975,Monthly Notices Roy. Astron. Soc. 171, 579.
Manchester, R. N. and Taylor, J. H.: 1977,Pulsars, W. H. Freeman and Coy.
Manchester, R. N. and Taylor, J. H.: 1981,Astron. J. (preprint).
Okeke, P. N. and Akujor, C. E.: 1982,Astrophys. Space Sci. 84, 243.
Ostriker, J. P. and Gunn, J. E.: 1969,Astrophys. J. 157, 1395.
Ritchings, R. T. and Lyne, A. G.: 1975,Nature 257, 293.
Smith, F. G.: 1977,Pulsars, Cambridge University Press.
Taylor, J. H. and Huguenin, G. R.: 1971,Astrophys. J. 167, 273.
Taylor, J. H. and Manchester, R. N.: 1977,Ann. Rev. Astron. Astrophys. 15, 19.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Akujor, C.E., Okeke, P.N. The existence of a ‘gap’ in the evolutionary sequence of pulsars. Astrophys Space Sci 85, 325–329 (1982). https://doi.org/10.1007/BF00653454
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00653454