Coherent Radiation Patterns Suggested by Single-Pulse Observations of a Millisecond Pulsar | Zendy

J. G. Ables | Zendy; D. McConnell | Zendy; A. A. Deshpande | Zendy; M. Vivekanand | Zendy

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Coherent Radiation Patterns Suggested by Single-Pulse Observations of a Millisecond Pulsar

Author(s) -

J. G. Ables,

D. McConnell,

A. A. Deshpande,

M. Vivekanand

Publication year - 1997

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/310455

Subject(s) - millisecond pulsar , physics , pulsar , astrophysics , pulse (music) , phase (matter) , millisecond , radiation , diffraction , optics , astronomy , detector , quantum mechanics

We have observed intense radiation spikes from the millisecond pulsar PSR J0437-4715 and find their distribution in pulsar spin phase to be quite unlike the integrated pulse profile. The spikes are observed almost exclusively in a 10° phase window centered on the main pulse. Within that window the phase distribution has a periodic variation, producing a pattern reminiscent of the diffraction fringes associated with coherent emission from a finite aperture. We propose a source model in which the spikes are emitted coherently from a region with spatial scale ap100 m

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