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• W2971330908 abstract "We present the X-ray analysis of dwarf nova EY Cyg using the 45 ks textit{XMM-Newton} observatory archival data obtained in quiescence. We find orbital modulations in X-rays. We simultaneously fitted EPIC pn, MOS1 and MOS2 data using a model for interstellar medium absorption (textit{tbabs}) and a multi-temperature plasma emission model with a power-law distribution of temperatures (CEVMKL) as expected from low accretion rate quiescent dwarf novae. The textit{XMM-Newton} EPIC spectra of the source yields a maximum temperature $kT_{rm max}$ $sim$ 14.9$^{+3.3}_{-2.2}$ keV with an unabsorbed X-ray flux and luminosity of (1.8--2.0) $times$ 10$^{-12}$ ergs$^{-1}$ cm$^{-1}$ and (8.7--9.7) $times$ 10$^{31}$ ergs$^{-1}$, respectively, in the energy range 0.1 to 50 keV. There is 3--4 sigma excess at energies below 0.5 keV, we model the excess using textit{MEKAL}, POWERLAW and BBODY models and favor the model textit{MEKAL} which is physical. According to previous studies, the secondary in this system is thought to be a K-type star which may radiate in the soft X-ray region. The fit with an additive textit{MEKAL} model gives a temperature of $kT$ $sim$ 0.1 keV with an unabsorbed X-ray flux and luminosity of (2.7--8.8) $times$ 10$^{-14}$ ergs$^{-1}$ cm$^{-1}$ and (1.3--4.2) $times$ 10$^{30}$ ergs$^{-1}$, respectively, for the companion star. Based on the results from the timing and spectral analysis, we highly suggest that the secondary of EY Cyg is a K-type star." @default.
• W2971330908 created "2019-09-05" @default.
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• W2971330908 date "2020-09-01" @default.
• W2971330908 modified "2023-09-24" @default.
• W2971330908 title "X-ray properties of dwarf nova EY Cyg and the companion star using an XMM-Newton observation" @default.
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• W2971330908 doi "https://doi.org/10.1016/j.asr.2019.08.033" @default.
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