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

S. Katajainen*, O. W. Butters, A. J. Norton, H. J. Lehto, V. Piirola

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

14 Citations (Scopus)

Abstract

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 similar to 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.

Original languageEnglish
Pages (from-to)1011-1018
Number of pages8
JournalAstronomy and Astrophysics
Volume475
Issue number3
DOIs
Publication statusPublished - Dec 2007

Keywords

  • stars : binaries : close
  • stars : magnetic fields
  • polarization
  • stars : novae, cataclysmic variables
  • stars : individual : RX J2133.7+5107
  • AM HERCULIS BINARIES
  • X-RAY EMISSION
  • MAGNETIC CATACLYSMIC VARIABLES
  • GALACTIC PLANE SURVEY
  • WHITE-DWARFS
  • CIRCULAR-POLARIZATION
  • 1RXS J154814.5-452845
  • ROSAT OBSERVATIONS
  • 1WGA J1958.2+3232
  • EVOLUTION

Cite this