A Very Luminous Binary Millisecond Pulsar

Details A Very Luminous Binary Millisecond Pulsar A Very Luminous Binary Millisecond Pulsar

Dec 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...455l..55n&link_type=abstract

Astrophysical Journal Letters v.455, p.L55

Astronomy and Astrophysics

Astronomy

66

Surveys, Stars: Pulsars: Individual Alphanumeric: Psr J0218+4232, Ism: Structure

Scientific paper

We report the discovery of a field binary millisecond pulsar, J0218+4232, with a period of 2.3 ms and in a 2.0 day binary orbit with a >~0.16 M&sun; companion. The new pulsar was serendipitously discovered as a steep-spectrum, highly polarized, compact radio source during imaging observations at Westerbork, and was later confirmed to be a pulsar with observations carried out with the 76 m antenna at Jodrell Bank. With a dispersion measure of 61 pc cm-3, it lies outside the electron layer in the direction l = 140 deg, b = -18 deg. At a distance of more than 5.7 kpc, it is the farthest known field millisecond pulsar and has a radio luminosity L400 comparable to that of PSR B1937+21. It appears that a significant fraction of the radio emission is not pulsed. This, together with the extremely broad pulse profile, suggests that we are looking at an aligned rotator.

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