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arXiv 0809.0518astro-ph
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致密星中夸克相的形成与SN爆炸

Formation of quark phases in compact stars and SN explosion

Alessandro Drago, Giuseppe Pagliara, Giulia Pagliaroli, Francesco Lorenzo Villante, Francesco Vissani

摘要:

我们描述了可能的情况下,夸克解除禁闭在紧凑型恒星,我们分析了它们的天体物理意义。夸克解除禁闭的过程可以迅速进行,作为一种强烈的爆燃,在短时间内释放出巨大的能量,并产生额外的中微子爆发。如果能量有效地转移到表面,例如在存在对流不稳定性的情况下,这种爆发可能有助于恢复部分失败的SN爆炸。我们将讨论如何从SN1987A中微子观测将适合在这种情况下。最后,我们专注于大质量和快速旋转的祖先的命运,讨论可能的时间间隔的核心崩溃的时刻和夸克解除禁闭的时刻之间。这种机制可以作为解释伽马射线暴的基础,在这种暴中,谱线中存在与重元素有关的谱线。

英文摘要:

We describe possible scenarios of quark deconfinement in compact stars and we analyze their astrophysical implications. The quark deconfinement process can proceed rapidly, as a strong deflagration, releasing a huge amount of energy in a short time and generating an extra neutrino burst. If energy is transferred efficiently to the surface, like e.g. in the presence of convective instabilities, this burst could contribute to revitalize a partially failed SN explosion. We discuss how the neutrino observations from SN1987A would fit in this scenario. Finally, we focus on the fate of massive and rapidly rotating progenitors, discussing possible time separations between the moment of the core collapse and the moment of quark deconfinement. This mechanism can be at the basis of the interpretation of gamma ray bursts in which lines associated with heavy elements are present in the spectrum.

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