The X-ray spectrum of RX J1914.4+2456 revisited
arXiv:0711.2449 · doi:10.1111/j.1365-2966.2007.12726.x
Abstract
It has been proposed that RX J1914.4+2456 is a stellar binary system with an orbital period of 9.5 mins. As such it shares many similar properties with RX J0806.3+1527 (5.4 mins). 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 inter-binary 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.
arXiv commentAccepted for publication in MNRAS
References in corpus (17)
- On the Absorption of X-rays in the Interstellar Medium
- The Magnificent Seven: Magnetic fields and surface temperature distributions
- Ultracompact X-Ray Binaries with Neon-Rich Degenerate Donors
- RXJ0806.3+1527: a double degenerate binary with the shortest known orbital period (321s)
- An electrically powered binary star?
- Detection of pulsations and a spectral feature in the X-ray emission of the isolated neutron star 1RXS J214303.7+065419/RBS 1774
- A Coherent Timing Solution for the Nearby Isolated Neutron Star RX J0720.4-3125
- A Coherent Timing Solution for the Nearby Isolated Neutron Star RX J1308.6+2127/RBS 1223
- The complex X-ray spectrum of the isolated neutron star RBS1223
- X-ray Spectroscopy of Candidate Ultracompact X-ray Binaries
- ULTRACAM Photometry of the ultracompact binaries V407 Vul and HM Cnc
- Timing Analysis of the Isolated Neutron Star RX J0720.4-3125 Revisited
- XMM-Newton observations of the ultra-compact binary RX J1914+24
- Unveiling the Nature of the 321 s Modulation in RX J0806.3+1527: Near-Simultaneous Chandra and VLT Observations
- GEMINI spectroscopy of the ultra-compact binary candidate V407 Vul
- Unipolar Inductor Model coupled to GW emission: energy budget and model application to RX J0806+15 and RX J1914+24
- XMM-Newton and Chandra observations of the ultra-compact binary RX J1914+24
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