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Discovery of polarised emission from the long period intermediate polar RX J2133.7+5107

Katajainen, S.; Butters, O. W.; Norton, A. J.; Lehto, H.J. and Piirola, V. (2007). Discovery of polarised emission from the long period intermediate polar RX J2133.7+5107. Astronomy & Astrophysics, 475(3) pp. 1011–1018.

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Aims. We intended to investigate the magnetic field properties of the recently identified intermediate polar RX J2133.7+5107.

Methods. We carried out UBVRI photopolarimetric observations of the target using TURPOL on the Nordic Optical Telescope over 2 nights in July/August 2006.

Results. We found that RX J2133.7+5107 emits circularly polarized light in all UBVRI bands (up to 3%). This is the first detection of circular polarization in this object. The circular polarization modulations and flux variations give hints of cyclotron beaming effects and suggest that the field strength in RX J2133.7+5107 is possibly one of the highest found amongst the IPs.

Conclusions. The highly asynchronous rotation of RX J2133.7+5107 (the spin to orbital period ratio is ~0.022), suggests that it has only recently come into contact and although it is likely to evolve into a polar, it is currently a long way from doing so. We suggest a possible link between the detection of a soft X-ray blackbody component and polarized optical emission in intermediate polars.

Item Type: Journal Article
Copyright Holders: 2007 ESO
ISSN: 1432-0746
Keywords: binary stars; magnetic fields; polarization; novae; cataclysmic variables
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 10089
Depositing User: Andrew Norton
Date Deposited: 16 Nov 2007
Last Modified: 30 Nov 2016 21:01
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