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Impact of Rotational Mixing on the Global and Asteroseismic Properties of Red Giants

机译：旋转混合对红巨星整体和抗震特性的影响

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摘要

The influence of rotational mixing on the global parameters and asteroseismic properties of red giant stars is reviewed. While red giants are generally characterised by low surface rotational velocities, they may have been rotating much more rapidly during the main sequence, so that the rotational history of a star has a large impact on its properties during the red giant phase. For stars massive enough to ignite helium burning in non-degenerate conditions, rotational mixing leads to a significant increase of the stellar luminosity and shifts the location of the core helium burning phase to a higher luminosity in the HR diagram. This results in a change of the seismic properties of red giants and of the fundamental parameters of a red giant star as determined by performing an asteroseismic calibration. For red giants with a lower mass that undergo the helium flash, rotational mixing decreases the luminosity of the bump at solar metallicity changing thereby the global and asteroseismic properties of these stars.
机译：综述了旋转混合对红色巨星整体参数和星震特性的影响。尽管红巨星通常以低的表面旋转速度为特征，但它们在主序列中的旋转速度可能要快得多，因此，恒星的旋转历史对其在红巨星相期间的性能影响很大。对于足以在非简并条件下点燃氦气燃烧的恒星，旋转混合会导致恒星发光度显着增加，并且在HR图中将核心氦气燃烧相的位置转移到较高的发光度。这会导致红巨星的地震特性和通过执行星震校准确定的红巨星基本参数发生变化。对于质量较小的红巨星，它们经历了氦闪光，旋转混合降低了太阳金属度时凸点的发光度，从而改变了这些恒星的整体和星震特性。

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