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The characteristics of millisecond pulsar emission:

By Ii. Polarimetry, Kiriaki M. Xilouris, Michael Kramer, Axel Jessner, Alexis Von Hoensbroech, Richard Wielebinski, Er Wolszczan and O Camilo

Abstract

We have made polarimetric monitoring observations of most of the millisecond pulsars visible from the northern hemisphere at 1410 MHz over a period of three years. Their emission properties are presented here and compared with those of normal pulsars. Although we demonstrated in paper I that millisecond pulsars exhibit the same flux density spectra and similar profile complexity, our results presented here suggest that millisecond pulsar profiles do not comply with the predictions of classification schemes based on “normal ” pulsars. The frequency development of a large number of millisecond pulsar profiles is abnormal when compared with the development seen for normal pulsars. Moreover, the polarization characteristics suggest that millisecond-pulsar magnetospheres might not simply represent scaled versions of the magnetospheres of normal pulsars, supporting results of paper I. However, phenomena such as mode-changing activity in both intensity and polarization are recognized here for the first time (e.g., J1730–2304). This suggests that while the basic emission mechanism remains insensitive to rotational period, the conditions that, according to the canonical pulsar model

Year: 1998
OAI identifier: oai:CiteSeerX.psu:10.1.1.316.915
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