2018MNRAS.477.4035Z

XY Ari is one of the few known eclipsing intermediate polars. We present results from a detailed analysis of an unpublished archival observation using XMM-Newton EPIC pn and MOS data in a quiescent state of XY Ari. The X-ray orbital modulation and spin-pulse variations were investigated for energy-dependent modulations in different energy bands. The broad orbital modulation observed with various observations was confirmed with XMM-Newton in the hard X-ray (>1.6 keV). The EPIC light curves folded at the spin phases show a double-peak profile, as expected from two-pole accretion. The pulse profile is found to be energy-dependent. Hardness-ratio variations and energy modulation depth during spin modulation can be explained by photoelectric absorption. The simultaneously fitted EPIC spectra with a multi-temperature plasma emission model (CEVMKL) model yield a maximum plasma temperature of 28^+3.1_–2.9 keV with an iron abundance Fe/Fe_☉=0.37^+0.06_–0.05. We find two intrinsic partial covering absorption columns of 6.2^+1.0_–0.9 ×10²² and 105.3^+35.4_–30.4 ×10²² cm^–2 with covering fractions of 0.53^+0.05_–0.04, 0.41^+0.14_–0.13, respectively. In addition, a Gaussian emission line at 6.43^+0.01_–0.02 keV with an equivalent width of 51⁺¹²_–10 eV is required to account for fluorescent emission from neutral iron. The X-ray luminosity of the source is 4.2 x 10³² erg s^–1 in the 0.2-10.0 keV energy band.