2016A&A...592A.127W -
Astronomy and Astrophysics, volume 592A, 127-127 (2016/8-1)
Investigation of nulling and subpulse drifting properties of PSR J1727-2739.
WEN Z.G., WANG N., YUAN J.P., YAN W.M., MANCHESTER R.N., YUEN R. and GAJJAR V.
Abstract (from CDS):
Aims. We intend to study of the nulling and subpulse drifting in PSR J1727-2739 in detail to investigate its radiation properties.
Methods. The observations were carried out on 20 March, 2004 using the Parkes 64-m radio telescope with a central frequency of 1518 MHz. A total of 5568 single pulses were analysed.
Results. This pulsar shows well-defined nulls with lengths lasting from 6 to 281 pulses and separated by burst phases ranging from 2 to 133 pulses. We estimate a nulling fraction of around 68%. No emission in the average pulse profile integrated over all null pulses is detected with significance above 3σ. Most transitions from nulls to bursts are within a few pulses, whereas the transitions from bursts to nulls exhibit two patterns of decay; these transitions either decrease gradually or rapidly. In the burst phase, we find that there are two distinct subpulse drift modes with vertical spacing between the drift bands of 9.7±1.6 and 5.2±0.9 pulse periods, while sometimes there is a third mode with no subpulse drifting. Some mode transitions occur within a single burst, while others are separated by nulls. Different modes have different average pulse profiles. Possible physical mechanisms are discussed.
Abstract Copyright:
© ESO, 2016
Journal keyword(s):
pulsars: general - pulsars: general
Simbad objects:
8
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