PSR 0540 + 23 revisited - Three components, drifting subpulses, and mode switching

Details PSR 0540 + 23 revisited - Three components, drifting subpulses, and mode switching PSR 0540 + 23 revisited - Three components, drifting subpulses, and mode switching

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...377..581n&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 377, Aug. 20, 1991, p. 581-587. Research supported by Research Corp.

Astronomy and Astrophysics

Astronomy

10

Neutron Stars, Pulsars, Pulsed Radiation, Radio Astronomy, Power Spectra, Pulse Modulation, Pulse Repetition Rate

Scientific paper

This paper reports the discovery of at least one previously unknown component in the average profile in PSR 0540 + 23, together with sporadic but organized drift of subpulses and short-term mode switching. The new component in the average profile is located behing the main component, in the tail of the profile, and can be seen separately from the main component of the profile when low-intensity pulses are integrated. Many individual pulses from this pulsar have two or three subpulses and that component can be seen in short series of only a few consecutive pulses. Subpulses that form the main part of the average profile exhibit well-organized drift in short series of a few pulses. No preferred direction of the drift can be seen, and there are also short trains of pulses where the drift stops. Occasionally drift of subpulses can be seen across most of the pulse window, and if it happens, it happens only once, and subsequent pulses exhibit a different behavior. Short segments of single pulses that behave in a similar way are repeated throughout the data, and this behavior is similar to what in other pulsars is recognized as mode switching.

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