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arXiv 0811.0904astro-ph
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INTEGRAL监测异常长的X射线爆发

INTEGRAL monitoring of unusually long X-ray bursts

J. Chenevez, M. Falanga, E. Kuulkers, S. Brandt, N. lund, A. Cumming

摘要:

X射线爆发是发生在低质量X射线双星中吸积中子星表面的热核爆炸。由于INTEGRAL经常观察到大多数已知的X射线爆发,因此一个国际合作组织一直在利用其仪器专门监测持续时间超过10分钟的异常爆发事件的发生。到目前为止,INTEGRAL已经观测到了一半的所谓中间长爆发。我们的目标是得到一个全面的图片之间的关系,核点火过程和吸积状态的系统导致这样长的爆发。根据吸积物质的组成,这些爆发可以解释为一大堆混合氢和氦的不稳定燃烧,或者是一层厚的纯氦层的点燃。中等长的爆发特别预计发生在非常低的吸积率,并有可能研究从富氢爆发制度到纯氦制度的过渡。

英文摘要:

X-ray bursts are thermonuclear explosions on the surface of accreting neutron stars in low mass X-ray binaries. As most of the known X-ray bursters are frequently observed by INTEGRAL, an international collaboration have been taking advantage of its instrumentation to specifically monitor the occurrence of exceptional burst events lasting more than ~10 minutes. Half of the so-called intermediate long bursts registered so far have been observed by INTEGRAL. The goal is to derive a comprehensive picture of the relationship between the nuclear ignition processes and the accretion states of the system leading up to such long bursts. Depending on the composition of the accreted material, these bursts may be explained by either the unstable burning of a large pile of mixed hydrogen and helium, or the ignition of a thick pure helium layer. Intermediate long bursts are particularly expected to occur at very low accretion rates and make possible to study the transition from a hydrogen-rich bursting regime to a pure helium regime.

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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