Consecutive Bright Pulses in the Vela Pulsar

Details Consecutive Bright Pulses in the Vela Pulsar Consecutive Bright Pulses in the Vela Pulsar

2011-06-23

arxiv.org/abs/1106.4625v1

2011, ApJ, 735, L17

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

Published in The Astrophysical Journal Letters 2011 June 9 (3 pages, 2 figures, 1 table)

Scientific paper

10.1088/2041-8205/735/1/L17

We report on the discovery of consecutive bright radio pulses from the Vela pulsar, a new phenomenon that may lead to a greater understanding of the pulsar emission mechanism. This results from a total of 345 hr worth of observations of the Vela pulsar using the University of Tasmania's 26 m radio telescope to study the frequency and statistics of abnormally bright pulses and sub-pulses. The bright pulses show a tendency to appear consecutively. The observations found two groups of six consecutive bright pulses and many groups of two to five bright pulses in a row. The strong radio emission process that produces the six bright pulses lasts between 0.4 and 0.6 s. The numbers of bright pulses in sequence far exceed what would be expected if individual bright pulses were independent random events. Consecutive bright pulses must be generated by an emission process that is long lived relative to the rotation period of the neutron star.

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