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arXiv 1210.0263hep-phastro-ph.SR
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再论轴子在白矮星冷却中的作用

Revisiting the Impact of Axions in the Cooling of White Dwarfs

Brenda Melendez, Marcelo Miller Bertolami, Leandro Althaus

摘要:

研究表明,白矮星的光度函数形状可以成为检查DFSZ轴子可能存在的有力工具。特别是,Isern等人(2008)指出,如果轴子的质量是几meV的数量级,那么白矮星的光度函数就足够灵敏,可以检测到它们的存在。对于大约$m_a > 5$ meV的轴子质量的轴子发射可以是一个主要的冷却机制的白矮星和反馈到白矮星的热结构的轴子发射需要考虑。在这里,我们提出的白矮星冷却序列的计算,考虑到轴子发射的影响,在一个自洽的方式通过完整的恒星演化计算。然后,我们研究和讨论了轴子辐射对白矮星光度函数的影响。

英文摘要:

It has been shown that the shape of the luminosity function of white dwarfs can be a powerful tool to check for the possible existence of DFSZ-axions. In particular, Isern et al. (2008) showed that, if the axion mass is of the order of a few meV, then the white dwarf luminosity function is sensitive enough to detect their existence. For axion masses of about $m_a > 5$ meV the axion emission can be a primary cooling mechanism for the white dwarf and the feedback of the axion emission into the thermal structure of the white dwarf needs to be considered. Here we present computations of white dwarf cooling sequences that take into account the effect of axion emission in a self consistent way by means of full stellar evolution computations. Then, we study and discuss the impact of the axion emission in the white dwarf luminosity function.

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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