A millisecond pulsar

Abstract

The radio properties of 4C21.53 have been an enigma for many years. First, the object displays interplanetary scintillations (IPS) at 81 MHz, indicating structure smaller than 1 are s, despite its low galactic latitude (−0.3°)1. IPS modulation is rare at low latitudes because of interstellar angular broadening. Second, the source has an extremely steep (v−2) spectrum at decametric wavelengths2. This combination of properties suggested that 4C21.53 was either an undetected pulsar or a member of some new class of objects. This puzzle may be resolved by the discovery and related observations of a fast pulsar, 1937+214, with a period of 1.558 ms in the constellation Vulpecula only a few degrees from the direction to the original pulsar, 1919+21. The existence of such a fast pulsar with no evidence either of a new formation event or of present energy losses raises new questions about the origin and evolution of pulsars.

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References

  1. 1

    Readhead, A. C. S. & Hewish, A. Nature 236, 440 (1972).

  2. 2

    Rickard, J. J. & Cronyn, W. Astrophys. J. 228, 755 (1979).

  3. 3

    Hewish, A. & Okoye, S. E. Nature 207, 55 (1965).

  4. 4

    Erickson, W. C. Bull. Am. astr. Soc. 12, 799 (1980).

  5. 5

    Slee, O. B. Austr. J. Phys. Suppl. 36, 1 (1977).

  6. 6

    Altenhoff, W. J., Dowries, D., Goad, L., Maxwell, A. & Rinehart, R. Astr. Astrophys. Suppl. 1, 419 (1979).

  7. 7

    Erickson, W. C. Astrophys. J. (in the press).

  8. 8

    Backer, D. C., Kulkarni, S. R., Heiles, C., Davis, M. M. & Goss, W. M. IAU Circ. No. 3743 (1982).

  9. 9

    Ostriker, J. P. & Gunn, J. E. Astrophys. J. 157, 1395 (1969).

  10. 10

    Swanenberg, B. N. et al. Astrophys. J. Lett. 243, L69 (1981).

  11. 11

    Djorgovski, S. Nature 300, 618–619 (1982).

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Backer, D., Kulkarni, S., Heiles, C. et al. A millisecond pulsar. Nature 300, 615–618 (1982). https://doi.org/10.1038/300615a0

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