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首页> 外文期刊>International journal of modern physics, D. Gravitation, astrophysics, cosmology >The effect of dark matter on stars at the Galactic center: The paradox of youth problem
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The effect of dark matter on stars at the Galactic center: The paradox of youth problem

机译：暗物质对银河系中恒星的影响：青年问题的悖论

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Stars that evolve near the Galactic massive black hole show strange behaviors. The spectroscopic features of these stars show that they must be old. But their luminosities are much higher than the amounts that are predicted by the current stellar evolutionary models, which means that they must be active and young stars. In fact, this group of stars shows signatures of old and young stars, simultaneously. This is a paradox known as the "paradox of youth problem" (PYP). Some people tried to solve the PYP without supposing dark matter (DM) effects on stars. But, in this work, we implemented Weakly Interacting Massive Particles (WIMPs) annihilation as a new source of energy inside such stars. This implementation is logical for stars that evolve at high DM density environments. The new source of energy causes stars to follow different evolutionary paths on the H-R diagram in comparison with classical stellar evolutionary models. Increasing DM density in stellar evolutionary simulations causes the deviations from the standard H-R diagrams becomes more pronounced. By investigating the effects of WIMPs density on stellar structures and evolutions, we concluded that by considering DM effects on stars at the Galactic center, it is possible to solve the PYP. In addition to DM effect, complete solutions to PYP must consider all extreme and unique physical conditions that are present near the Galactic massive black hole.
机译：在银河系巨大的黑洞附近发展的星星表现出奇怪的行为。这些星星的光谱特征表明他们必须老。但他们的发光远高于当前恒星进化模型预测的金额，这意味着它们必须是活跃和年轻的恒星。事实上，这群明星显示了旧恒星的签名，同时。这是一个称为“青年问题的悖论”（PYP）的悖论。有些人试图解决PYP而不会对星空进行暗物质（DM）影响。但是，在这项工作中，我们实施了弱互动的大规模颗粒（WIMPS）湮灭作为这种恒星内的新能量来源。此实现对于在高DM密度环境中发展的恒星是逻辑的。与经典恒星进化模型相比，新的能量来源导致星形遵循H-R图上的不同进化路径。恒星进化模拟中增加DM密度导致标准H-R图中的偏差变得更加明显。通过研究WIMPS密度对恒星结构和演变的影响，我们得出结论，通过考虑到银河系中心的恒星的DM效应，可以解决PYP。除DM效力外，对PYP的完整解决方案必须考虑银河系巨大黑洞附近存在的所有极端和独特的物理条件。

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