ROSAT observations of RX J1712.6-2414: a discless intermediate polar?
Abstract
We present ROSAT observations of the newly discovered polarized intermediate polar, RX J1712.6-2414. Whereas the polarimetry establishes the white dwarf spin period to be 927s, we show that the X-ray variations occur at the 1003-s synodic (i.e., beat) period. This period is also sometimes seen in both the optical photometry and the radial velocities. New filtered polarimetry of RX J1712.6-2414 establishes a strong wavelength dependence in the circular polarization variations. We argue that these new observations support the contention that RX J1712.6-2414 is a discless accreting system, and the first clear case amongst the asynchronous intermediate polars.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- May 1997
- DOI:
- 10.1093/mnras/287.1.117
- Bibcode:
- 1997MNRAS.287..117B
- Keywords:
-
- ACCRETION;
- ACCRETION DISCS;
- STARS: INDIVIDUAL: RX J1712.6-2414;
- STARS: MAGNETIC FIELDS;
- NOVAE;
- CATACLYSMIC VARIABLES;
- WHITE DWARFS;
- X-RAYS: STARS