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

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

Jan 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997apj...475l..33a&link_type=abstract

Astrophysical Journal Letters v.475, p.L33

Astronomy and Astrophysics

Astronomy

11

Radiation Mechanisms: Nonthermal, Stars: Pulsars: Individual Alphanumeric: Psr J0437-4715

Scientific paper

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 deg 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 ~100 m.

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