V1432 Aql: A polar or an intermediate polar?

Singh, KP and Rana, VR (2003) V1432 Aql: A polar or an intermediate polar? In: Astronomy and Astrophysics, 410 . pp. 231-238.

PDF aa3626.pdf - Published Version Restricted to Registered users only Download (311kB) | Request a copy

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.

Item Type:	Journal Article
Publication:	Astronomy and Astrophysics
Publisher:	ESO
Additional Information:	Copyright of this article belongs to ESO.
Keywords:	accretion, accretion disks;stars: binaries: close;stars:novae;cataclysmic variables;stars:individual: V1432 Aql;X-rays: stars.
Department/Centre:	Division of Physical & Mathematical Sciences > Joint Astronomy Programme Division of Physical & Mathematical Sciences > Physics
Date Deposited:	13 Nov 2009 05:49
Last Modified:	19 Sep 2010 04:57
URI:	http://eprints.iisc.ac.in/id/eprint/17636

Actions (login required)

View Item