X-ray Spectral Characteristics of V1432 Aquilae: An Unusual Hot Polar

Results from spectral analysis of X-ray data, with the RXTE and X M M-Newton for an asynchronous polar V1432 Aql are presented based on two spectral models - a multi-temperature plasma model and a photo-ionized plasma model. Using a multi-temperature plasma model, the RXTE PCA data are used to constrain the mass of the white dwarf to be 1.2 +/- 0.1 M-circle dot. A strong soft X-ray excess below 0.8 keV, seen with X M M MOS, is modelled by a black body component having temperature of 80-90 eV. The emission lilies seen at 6.7 and 7.0 keV are well fit rising the multi-temperature plasma model, however the 6.4 keV line requires an additional Gaussian component. Two absorbers, one that fully covers the source and another that covers similar to 65% of the source are required. The results from spin phase resolved spectroscopy indicate varying absorption parameters and varying 6.4 keV line flux. X-ray spectral characteristics and their variation with the spin period suggest that V1432 Aql is all unusual hot Polar. The photo-ionized plasma model with a range of column densities for the Fe ions gives a slightly better overall fit and fits all emission line features.