CoRoT测量比太阳热的恒星中类似太阳的振荡和颗粒化
CoRoT measures solar-like oscillations and granulation in stars hotter than the Sun
摘要：
太阳的振动被用来了解它的内部结构。尽管国际社会在过去几十年中作出了巨大努力，但将类似的研究扩展到更遥远的恒星却遇到了许多困难。2006年12月发射的CoRoT（对流旋转和行星凌日）卫星现在已经测量了三颗明显比太阳热的主序星的振荡和恒星颗粒特征。振荡幅度大约是太阳的1.5倍;恒星颗粒高达3倍。恒星的振幅比理论值低25%左右，提供了一个测量恒星外层振荡过程的非绝热性的方法。
英文摘要：
Oscillations of the Sun have been used to understand its interior structure. The extension of similar studies to more distant stars has raised many difficulties despite the strong efforts of the international community over the past decades. The CoRoT (Convection Rotation and Planetary Transits) satellite, launched in December 2006, has now measured oscillations and the stellar granulation signature in three main sequence stars that are noticeably hotter than the sun. The oscillation amplitudes are about 1.5 times as large as those in the Sun; the stellar granulation is up to three times as high. The stellar amplitudes are about 25% below the theoretic values, providing a measurement of the nonadiabaticity of the process ruling the oscillations in the outer layers of the stars.
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