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Received; accepted 1Based on observations made with the NASA-CNES-CSA Far Ultraviolet Spectroscopic (2001)
| Content Provider | CiteSeerX |
|---|---|
| Author | Hutchings, J. B. Fullerton, A. W. Schmidtke, P. C. Cowley, A. P. Crampton, D. |
| Abstract | FUSE spectra were obtained of the supersoft X-ray binary RX J0019.8+2156 (QR And) during 16 consecutive spacecraft orbits, covering the binary orbit (P=15.85 hr) with about 0.2 phase overlap. The spectrum is dominated by strong H2 absorption (column density ∼10 20 g cm −2), which appears at the velocity different from other interstellar absorption lines and may be partially circumbinary. This absorption makes study of spectral features from the binary system difficult. The only well-detected emission lines are He II, 1085˚A, and O VI, 1032˚A, (the other line of the O VI doublet, 1037˚A, is largely obscured by strong H2 absorption). The O VI shows a P Cygni profile that varies in velocity and strength with binary phase. We compare this with similar changes seen in Balmer line profiles. We extract the FUV light curve and compare it with the optical light curve. There is an eclipse in both wavelength regions, but the FUV minimum lasts much longer, well beyond the visible light egress. The FUV results are discussed in connection with the binary model and mass flows within the system. Subject headings: ultraviolet: stars – (stars:) binaries: close – X-rays: binaries – stars: individual (RX J0019.8+2156 = QR And) – ISM: jets and outflows – 3 – 1. |
| File Format | |
| Publisher Date | 2001-01-01 |
| Access Restriction | Open |
| Subject Keyword | Binary System Fuv Minimum Balmer Line Profile Spectral Feature Vi Doublet Similar Change Nasa-cnes-csa Far Ultraviolet Spectroscopic Wavelength Region Well-detected Emission Line Visible Light Egress Supersoft X-ray Binary Rx J0019 Consecutive Spacecraft Orbit Close X-ray Interstellar Absorption Line Cygni Profile Rx J0019 Strong H2 Absorption Binary Star Subject Heading Mass Flow Binary Model Binary Orbit Optical Light Curve Column Density Fuv Result Fuse Spectrum Phase Overlap Binary Phase Fuv Light Curve |
| Content Type | Text |
