VLA observations of the fast pulsar candidate in M 28

Astronomy and Astrophysics – Astronomy

Scientific paper

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Globular Clusters, Pulsars, Radio Sources (Astronomy), Radio Spectra, Stellar Evolution

Scientific paper

The radio source at the center of the globular cluster M 28 is observed with the VLA at 327 MHz, confirming previous lower-frequency observations (Mahoney and Erickson, 1985) which indicated that this source has an unusually steep spectrum. It appears to be compact, and it is also highly polarized, giving it a set of properties characteristic of radio pulsars. Evolutionary considerations, along with its nondetection in previous pulsar surveys, strongly suggest that it is a millisecond pulsar.

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