• Zengin Camurdan, Dicle
• Balman, Solen
• Burwitz, Vadim

Abstract

XY Ari is one of the few known eclipsing intermediate Polar. We present results of total spectrum and spin phase-resolved X-ray spectroscopy of XY Ari. We utilize archival data of XMM-Newton EPIC-pn and MOS in a quiescent state of the source. The X-ray orbital modulation and spin pulse variations are investigated in 0.2-10 keV energy band and also in different energy bands. Our results confirmed the broad orbital modulation observed with various observations at hard X-ray (>1.6 keV). The pulse profile showed a double peak profile as expected from two pole accretion and it is found to be energy dependent. The adopted model is composed of CEVMKL and a Gaussian line at 6.43 eV to account for the continuum which is partially absorbed. The maximum plasma temperature is found 28 keV with an iron abundance 0.37. We find two intrinsic partial covering absorption columns of 6.2 x10^{22} cm ^{-2} and 105.3 x10 ^{22} cm ^{-2} with covering fraction of 0.53, 0.41 respectively. The X-ray luminosity of the source is 4.2 x10 ^{32} erg s ^{-1} in the 0.2-10 keV energy band assuming a 270 pc distance. The spin-phase resolved spectral analysis of XY Ari confirm the variation of the absorption column parameters. The energy dependent nature of the X-ray spin pulse and the presence of absorption in its spectrum are seen generally in IPs indicating an accretion column absorbing structure....

Topics

• impedance spectroscopy
• phase
• iron
• X-ray spectroscopy