论文标题
暗物质对银河中心星星的影响：青年问题的悖论
The Effect of Dark Matter on Stars at the Galactic Center: The Paradox of Youth Problem
论文作者
论文摘要
在银河巨大的黑洞附近进化的星星显示出奇怪的行为。这些星星的光谱特征表明它们必须老了。但是它们的亮度远高于当前恒星进化模型预测的量，这意味着它们必须是活跃的恒星和年轻的恒星。实际上，这群恒星同时显示了老年和年轻恒星的签名。这是一个被称为“青年问题的悖论”（PYP）的悖论。有些人试图在不假设恒星的暗物质影响的情况下解决PYP。但是，在这项工作中，我们实施了弱相互作用的巨大颗粒（WIMP），作为此类恒星内部的新能源来源。对于在高暗物质密度环境下进化的恒星来说，这种实现是合乎逻辑的。与经典恒星进化模型相比，新的能源使恒星在H-R图上遵循不同的进化路径。恒星进化模拟中的暗物质密度增加会导致与标准H-R图的偏差变得更加明显。通过研究WIMP密度对恒星结构和演变的影响，我们得出的结论是，通过考虑银河系中心恒星的暗物质影响，可以解决PYP。除了暗物质效应外，PYP的完整解决方案还必须考虑银河巨大黑洞附近存在的所有极端和独特的物理条件。
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 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 dark matter 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 dark matter 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 dark matter effects on stars at the Galactic center, it is possible to solve the PYP. In addition to dark matter effect, complete solutions to PYP must consider all extreme and unique physical conditions that are present near the Galactic massive black hole.
