天蝎座X-1全轨道的FUSE观测
FUSE Observations of a Full Orbit of Scorpius X-1
摘要：
我们用远紫外光谱探测器获得了天蝎座X-1在900-1200埃范围内的紫外光谱。最强的发射线是1032、1038 A处的OVI双峰和1175 A处的CIII络合物。光谱受到大量原子和分子的狭窄星际吸收线的影响。线的变化和多普勒断层图像的检查表明，从捐助星和吸积盘附近的排放。湍流和多普勒加宽的开普勒盘线的模型多普勒移动的轨道的中子星添加到狭窄的高斯发射线与不确定的多普勒位移适合的数据与一致的值的磁盘半径，倾角，和径向线亮度轮廓。窄分量随轨道的多普勒频移表明与供体星有关。我们测试我们的线模型与以前分析的近紫外光谱与哈勃太空望远镜戈达德高分辨率光谱仪和档案光谱与HST宇宙起源光谱仪获得。
英文摘要：
We obtained UV spectra of X-ray binary Scorpius X-1 in the 900-1200 A range with the Far Ultraviolet Spectroscopic Explorer over the full 0.79 day binary orbit. The strongest emission lines are the doublet of O VI at 1032,1038 A and the C III complex at 1175 A. The spectrum is affected by a multitude of narrow interstellar absorption lines, both atomic and molecular. Examination of line variability and Doppler tomograms suggests emission from both the neighborhood of the donor star and the accretion disk. Models of turbulence and Doppler broadened Keplerian disk lines Doppler shifted with the orbit of the neutron star added to narrow Gaussian emission lines with undetermined Doppler shift fit the data with consistent values of disk radius, inclination, and radial line brightness profile. The Doppler shift of the narrow component with the orbit suggests an association with the donor star. We test our line models with previously analyzed near UV spectra obtained with the Hubble Space Telescope Goddard High Resolution Spectrograph and archival spectra obtained with the HST Cosmic Origins Spectrograph.
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