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arXiv 1705.05071astro-ph.HE
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低光度吸积中子星中的喷流-喷流耦合

Disk-jet coupling in low-luminosity accreting neutron stars

V. Tudor, J. C. A. Miller-Jones, A. Patruno, C. R. D'Angelo, P. G. Jonker, D. M. Russell, T. D. Russell, F. Bernardini, F. Lewis, A. T. Deller, J. W. T. Hessels… 展开作者

V. Tudor, J. C. A. Miller-Jones, A. Patruno, C. R. D'Angelo, P. G. Jonker, D. M. Russell, T. D. Russell, F. Bernardini, F. Lewis, A. T. Deller, J. W. T. Hessels, S. Migliari, R. M. Plotkin, R. Soria, R. Wijnands

摘要:

在爆发时,中子星X射线双星在给定的X射线光度下产生的喷流不如黑洞强。这使得研究它们变得更加困难,因为它们逐渐趋于平静。探索中子星是否以低吸积率为喷流提供动力($L_{\rm X} \lesssim 10^{36}$ erg $^{-1}$),我们研究了三个吸积毫秒X射线天体的射电和X射线性质(IGR J17511-3057,SAX J1808.4-3658和IGR J 00291 +5934)在2015年爆发期间,以及无脉冲中子星岑X-4在静止期(2015年)和爆发期(1979年)的照片。我们没有探测到IGR J17511-3057在爆发时的射电对应物,也没有探测到岑X-4在静止时的射电对应物,但探测到了IGR J 00291 +5934和SAX J1808.4-3658,这表明至少有一些中子星以低吸积率发射喷流。虽然IGR J 00291 +5934的射电和X射线发射似乎紧密相关,但SAX J1808.4-3658的关系更为复杂。我们发现,SAXJ1808.4 -3658产生的喷气式飞机在盘旋的尾巴,我们探索一个玩具模型,以确定无线电发射是否可以归因于一个强大的螺旋桨的发病。由于缺乏普遍的射电/X射线相关性,不同的中子星系统有不同的行为(有不同的射电/X射线相关性;有些是射电微弱的,有些不是),这表明在各个源中有不同的盘喷相互作用,而在射电波段中总是比相同X射线光度的黑洞更微弱。

英文摘要:

In outburst, neutron star X-ray binaries produce less powerful jets than black holes at a given X-ray luminosity. This has made them more difficult to study as they fade towards quiescence. To explore whether neutron stars power jets at low accretion rates ($L_{\rm X} \lesssim 10^{36}$ erg s$^{-1}$), we investigate the radio and X-ray properties of three accreting millisecond X-ray pulsars (IGR J17511-3057, SAX J1808.4-3658 and IGR J00291+5934) during their outbursts in 2015, and of the non-pulsing neutron star Cen X-4 in quiescence (2015) and in outburst (1979). We did not detect the radio counterpart of IGR J17511-3057 in outburst or of Cen X-4 in quiescence, but did detect IGR J00291+5934 and SAX J1808.4-3658, showing that at least some neutron stars launch jets at low accretion rates. While the radio and X-ray emission in IGR J00291+5934 seem to be tightly correlated, the relationship in SAX J1808.4-3658 is more complicated. We find that SAX J1808.4-3658 produces jets during the reflaring tail, and we explore a toy model to ascertain whether the radio emission could be attributed to the onset of a strong propeller. The lack of a universal radio/X-ray correlation, with different behaviours in different neutron star systems (with various radio/X-ray correlations; some being radio faint and others not), points at distinct disk-jet interactions in individual sources, while always being fainter in the radio band than black holes at the same X-ray luminosity.

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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