EDP Sciences
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Volume 381, Number 3, January III 2002
Page(s) 993 - 999
Section Formation, structure and evolution of stars
DOI http://dx.doi.org/10.1051/0004-6361:20011525

A&A 381, 993-999 (2002)
DOI: 10.1051/0004-6361:20011525

Pulsar "drifting"-subpulse polarization: No evidence for systematic polarization-angle rotations

R. Ramachandran1, J. M. Rankin2, B. W. Stappers1, M. L. A. Kouwenhoven3 and A. G. J. van Leeuwen3

1  Stichting ASTRON, 7990 AA Dwingeloo, The Netherlands
2  Sterrenkundig Instituut "Anton Pannekoek", 1098 SJ Amsterdam, The Netherlands
    e-mail: jrankin@astro.uva.nl
3  Sterrenkundig Instituut, 3508 TA Utrecht, The Netherlands
    e-mail: A.G.J.vanLeeuwen@astro.uu.nl

(Received 5 October 2001 / Accepted 29 October 2001 )

Polarization-angle density displays are given for pulsars B0809+74 and B2303+30, which exhibit no evidence of the systematic polarization-angle rotation within individual subpulses previously reported for these two stars. The "drifting" subpulses of both pulsars exhibit strikingly linear and circular polarization which appears to reflect the characteristics of two nearly orthogonally polarized emission "modes" - along which the severe average-profile depolarization that is characteristic of their admixture at comparable overall intensities.

Key words: stars: pulsars: B0809+74, B2303+30 -- polarisation -- radiation mechanisms: non-thermal

Offprint request: R. Ramachandran, ramach@astro.uva.nl

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