A millisecond pulsar

Details A millisecond pulsar A millisecond pulsar

Dec 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982natur.300..615b&link_type=abstract

Nature, vol. 300, Dec. 16, 1982, p. 615-618. Research supported by the Stichting Radiostraling van Zon en Melkweg and NSF.

Astronomy and Astrophysics

Astronomy

452

Pulsars, Radio Astronomy, Scintillation, Stellar Evolution, Decametric Waves, Energy Dissipation, Radiant Flux Density, Spectrum Analysis, Stellar Spectra

Scientific paper

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 arcsec, despite its low galactic latitude. IPS modulation is rare at low latitudes because of interstellar angular broadening. Second, the source has an extremely steep spectrum at decametric wavelengths. 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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