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Abstract: We have conducted observations of 22 pulsars at frequencies of 0.7, 1.4 and3.1 GHz and present their polarization profiles. The observations were carriedout for two main purposes. First we compare the orientation of the spin andvelocity vectors to verify the proposed alignment of these vectors by Johnstonet al. 2005. We find, for the 14 pulsars for which we were able to determineboth vectors, that 7 are plausibly aligned, a fraction which is lower than, butconsistent with, earlier measurements. Secondly, we use profiles obtainedsimultaneously at widely spaced frequencies to compute the radio emissionheights. We find, similar to other workers in the field, that radiation fromthe centre of the profile originates from lower in the magnetosphere than theradiation from the outer parts of the profile.



Autor: Simon Johnston, M. Kramer, A. Karastergiou, G. Hobbs, S. Ord, J. Wallman

Fuente: https://arxiv.org/







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