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arXiv 2009.00639astro-ph.HEastro-ph.SR
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X射线双星的喷流和盘的研究是理解喷流物理和双星参数的有力工具

Eclipses of jets and discs of X-ray binaries as a powerful tool for understanding jet physics and binary parameters

Thomas J. Maccarone, Jakob van den Eijnden, Thomas D. Russell, Nathalie Degenaar

摘要:

计算了施主星对食双星X射线喷流的光谱能量分布和光变曲线的影响。喷流在所有的倾角下都会被日食,而日食发生的高度由轨道参数决定。通常,日食将导致喷流发射在波长的几个因子的范围内减少5- 10%,具有周期性调制。在具有高倾角、相对均匀的质量比和适度喷流速度的理想系统中,日食可能更深。我们将讨论如何日食可以用来测量双星系统的参数,以及高度的基础上的喷流。我们还讨论了如何,与数据集,将可能需要未来的设施,更详细的测试模型的射流物理可以通过建立偏离标准配方紧凑的圆锥形平谱射流,并通过确定的入口和出口的持续时间的日食和测量的横向大小的射流。我们提供了代表性的计算的期望不同类别的系统,表明最有前途的目标,在无线电波段显示这种效果是较长的周期“环礁”类中子星X射线二进制,而在光学和红外波段,最好的候选人可能是最边缘的黑洞X射线二进制。我们还讨论了外吸积盘遮蔽内喷流的影响。

英文摘要:

We calculate the expected effects on the spectral energy distributions and light curves in X-ray binary jets from eclipses by the donor stars. Jets will be eclipsed for all inclination angles, with just the height along the jet where the eclipse takes place being set by the orbital parameters. Typically, eclipses will lead to 5-10\% reductions in the jet emission over a range of a factor of few in wavelength with a periodic modulation. In ideal systems with high inclination angles, relatively even mass ratios, and modest jet speeds, the eclipses may be deeper. We discuss how eclipses can be used to measure binary system parameters, as well as the height of the bases of the jets. We also discuss how, with data sets that will likely require future facilities, more detailed tests of models of jet physics could be made, by establishing deviations from the standard recipes for compact conical flat spectrum jets, and by determining the ingress and egress durations of the eclipses and measuring the transverse size of the jets. We provide representative calculations of expectations for different classes of systems, demonstrating that the most promising target for showing this effect in the radio band are the longer period "atoll"-class neutron star X-ray binaries, while in the optical and infrared bands, the best candidates are likely to be the most edge-on black hole X-ray binaries. We also discuss the effects of the outer accretion disc eclipsing the inner jet.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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