Title: The hard X-ray spectral analysis of EX Hydrae using NuSTAR observation

Authors: Shuvajit Khatua, Dr. Vikram Rana

In case of accreting magnetic White Dwarf (WD), the accretion flows follow the magnetic field lines and fall on to the pole of the WD. Because of the supersonic speed, the flows get shock at the Post-shock Region (PSR) by penetrating the atmosphere of WD. We have used hard X-ray imaging instrument’s (NuSTAR(FPMA/B)) observation of the EX Hya to measure the shock temperature, it comes  keV. We conclude that the multi-temperature cooling flow model is better to take of the emission of PSR in the hard X-ray energy band (3.0-79.0 keV) rather than multiple single temperature collisionally-ionized gas emission models. We also have obtained the mass of the EX Hya is  M⊙, which agrees very well with the value was obtained before.