论文标题

X射线研究的冠状动脉脱落二进制

An X-ray study of coronally connected active eclipsing binaries

论文作者

Singh, Gurpreet, Pandey, J. C.

论文摘要

我们提出了五个冠状动脉连接的二进制二进制文件的恒星冠状动脉的详细X射线分析和成像,即44 boo,dv psc,er vul,er vul,xy uma和tx cnc。这些二进制组的两个组成部分都被发现是活跃的。独立式和半度假类型系统的X射线光曲线显示出类似于黯然失色的特征,而接触型系统则没有显示冠状会黯然失色的证据。 DV PSC的X射线光曲线显示了O'Connell样效果,其中第一个最大值比第二个最大效果更明亮。使用X射线光曲线的三维反卷积的冠状成像的结果表明,所有这些二进制文件的冠状均处于接触式或过度接触构型中,其主要是1.7 $ -4 $ -4倍的X射线X射线比其同伴更明亮。在当前样本中,发现至少30 $ -50 \ $ 50 \%的总紫外线排放源来自光球,并且与X射线排放呈正相关。这些系统的X射线光谱通过两个温度的血浆模型很好地解释了。与等离子体的凉爽和热成分相对应的温度分别在0.25 $ -0.64和0.9 $ -1.1 KEV的范围内。对于样品中的大多数二进制文件,相位分辨的X射线光谱分析显示了X射线光度和发射度量的轨道调制,与热分分量相对应。在四个系统中还检测到了七个爆炸事件,其耀斑能量在(1.95 $ - $ 27.0)$ \ times $ 10 $^{33} $ erg和10 $^{9-11} $ cm的订单的订单长度。

We present a detailed X-ray analysis and imaging of stellar coronae of five coronally connected eclipsing binaries, namely, 44 Boo, DV Psc, ER Vul, XY UMa, and TX Cnc. Both components of these binaries are found to be active. The X-ray light curves of detached and semidetached type systems show eclipsed-like features, whereas no evidence for coronal eclipsing is shown by the contact type systems. The X-ray light curve of DV Psc shows the O'Connell-like effect where the first maximum is found to be brighter than that of the second. Results of the coronal imaging using three-dimensional deconvolution of X-ray light curves show the coronae of all these binaries are either in the contact or over-contact configuration, with the primary being 1.7 $-$ 4 times X-ray brighter than its companion. In the current sample, a minimum of 30$-$50 \% of total UV emission is found to originate from the photosphere and positively correlated with the X-ray emission. X-ray spectra of these systems are well explained by two-temperature plasma models. The temperature corresponding to cool and hot components of plasma are found to be in the ranges of 0.25$-$0.64 and 0.9$-$1.1 keV, respectively. For the majority of binaries in the sample, the phase-resolved X-ray spectral analysis shows the orbital modulation in X-ray luminosity and emission measure corresponding to the hot component. A total of seven flaring events are also detected in the four systems with the flare energy in the range of (1.95$-$27.0)$\times$10$^{33}$ erg and loop length of the order of 10$^{9-11}$ cm.

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