The X-ray spectrum of RX J1914.4+2456 revisited |
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| Authors: | Gavin Ramsay |
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| Institution: | Armagh Observatory, College Hill, Armagh BT61 9DG |
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| Abstract: | It has been proposed that RX J1914.4+2456 is a stellar binary system with an orbital period of 9.5 min. As such it shares many similar properties with RX J0806.3+1527 (5.4 min). However, while the X-ray spectrum of RX J0806.3+1527 can be modelled using a simple absorbed blackbody, the X-ray spectrum of RX J1914.4+2456 has proved difficult to fit using a physically plausible model. In this paper, we re-examine the available X-ray spectra of RX J1914.4+2456 taken using XMM–Newton . We find that the X-ray spectra can be fitted using a simple blackbody and an absorption component which has a significant enhancement of neon compared to the solar value. We propose that the material in the interbinary system is significantly enhanced with neon. This makes its intrinsic X-ray spectrum virtually identical to RX J0806.3+1527. We re-access the X-ray luminosity of RX J1914.4+2456 and the implications of these results. |
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| Keywords: | stars: abundances binaries: general stars: individual: RX J1914 4+2456 stars: individual: RX J0806 3+1527 X-rays: binaries |
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