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arXiv 1709.07040astro-ph.HEnucl-th
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致密星中的相变:成核机制和$γ$射线爆发的再研究

Phase transition in compact stars: nucleation mechanism and $γ$-ray bursts revisited

Kauan D. Marquez, Débora P. Menezes

摘要:

基于Lifshitz-Kagan理论,我们重新讨论了核化过程,这是由强子物质构成的脉冲星向夸克星转化的基本机制。我们已经选择了适当的模型,已测试实验和观测的限制,以限制模型的任意性,目前在以前的调查。确定了相变压力和化学势,计算了隧穿几率和成核时间。得到了亚稳强子相半衰期为一年的临界压强。即使对模型的选择施加了限制,结果仍然依赖于模型,但我们发现,使稳定物质的出现成为可能的隧穿需要超压,这实际上与夸克物质袋常数无关。最后,我们证实了成核过程可能是伽马射线暴的原因之一。

英文摘要:

We have revisited the nucleation process based on the Lifshitz-Kagan theory, which is the underlying mechanism of conversion of a pulsar constituted of hadronic matter to a quark star. We have selected appropriate models that have been tested against experimental and observational constraints to restrict the model arbitrariness present in previous investigations. The phase transition pressures and chemical potentials have been identified and afterwards, the tunneling probabilities and the nucleation time were computed. The critical pressures for which the half life of the metastable hadronic phase is one year were obtained. Even with the restrictions imposed to the selection of models, the results remained model dependent, but we found that the tunneling that makes possible the appearance of stable matter requires an overpressure that is practically independent of the quark matter bag constant. Finally, we have confirmed that the nucleation process can be one of the causes of gamma-ray bursts.

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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