V1432 Aql: A polar or an intermediate polar?
Abstract
We present evidence for a spin period of 4070 s in a magnetic cataclysmic variable V1432 Aql, classified as a polar. The evidence is based on the analysis of archival X-ray data obtained from a 25 ks long and uninterrupted observations with XMM-Newton. We also detect modulation of the X-ray flux with the orbital period, various harmonics of the spin period, and side-bands due to beating of the spin period with the orbital period. The energy-dependent light curves and hardness ratios show a very complex behaviour with both the spin phase and the orbital phase, indicating the presence of multiple absorbers of different densities. The observed characteristics suggest the presence of a disk in the system and accretion via a disk-overflow mechanism as is commonly observed in intermediate polars.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- October 2003
- DOI:
- 10.1051/0004-6361:20031222
- Bibcode:
- 2003A&A...410..231S
- Keywords:
-
- accretion;
- accretion disks;
- stars: binaries: close;
- stars: novae;
- cataclysmic variables;
- stars: individual: V1432 Aql;
- X-rays: stars