Norton, A.J.; Quaintrell, H.; Katajainen, S.; Lehto, H.J.; Mukai, K. and Negueruela, I.
Pulsations and orbital modulation of the intermediate polar 1WGA J1958.2+3232.
Astronomy and Astrophysics, 384(1) pp. 195–205.
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We present optical photometry, spectroscopy and photopolarimetry, as well as ASCA X-ray observations, of the recently discovered intermediate polar 1WGA J1958.2+3232. Through the first detection of an optical beat frequency, we confirm the previously tentative suggestion that the spin period of the white dwarf is twice the X-ray and optical pulsation period, which we also confirm in each case. We detect an orbital modulation in each of the U, B, V, R and I bands for the first time, and suggest that the true orbital period is the -1d alias of that previously suggested. We also confirm the presence of circular polarization in this system, detecting a variable polarization which has opposite signs in each of the B and R bands. The double peaked pulse profile and oppositely signed polarization pulses suggest that 1WGA J1958.2+3232 accretes onto both magnetic poles via a disc which is truncated relatively close to the white dwarf.
|Project Funding Details:
|Funded Project Name||Project ID||Funding Body|
|Not Set||Not Set||Particle Physics and Astronomy Research Council (PPARC) [grant PPA/G/O/2000/00037]|
|Not Set||Not Set||Particle Physics and Astronomy Research Council (PPARC) [grant GR/L64621]|
|Not Set||Not Set||Finnish Academy [grant 71 355; 44 011]|
||Some of the symbols may not have transferred correctly into this bibliographic record and/or abstract. Article published by EDP Sciences and available at http://www.edpsciences.org/aa or http://dx.doi.org/10.1051/0004-6361:20011820
||novae; cataclysmic variables; stars; magnetic fields; stars individual; 1WGA J1958.2+3232
||Science > Physical Sciences
|Interdisciplinary Research Centre:
||Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
||Users 6827 not found.
||06 Jul 2006
||11 Feb 2012 21:34
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