论文标题
Veselka：CP恒星中元素丰度的垂直分层
VeSElkA: Vertical Stratification of Element Abundances in CP stars
论文作者
论文摘要
上主序列恒星的一部分被称为化学特殊（CP）恒星，显示出明显的丰度异常，这主要是由于这些恒星恒星大气中化学元件的原子扩散所致。缓慢旋转的CP恒星可能具有流体动力学稳定的气氛，在这些气氛中，引力和辐射力之间的竞争会导致原子扩散，这可能导致CP恒星中观察到的丰度特征。最近，启动了Veselka项目（元素丰度的垂直分层），目的是检测和研究CP恒星大气中元素丰度的垂直分层。此处介绍了几种缓慢旋转（v $ \ sin {i} $ <40 km/s）CP星的丰度分析的一些结果。在HD〜22920，HD〜41076，HD〜95608，HD〜116235，HD〜148330和HD〜148330和HD〜157087中，发现了几种化学元素的垂直丰度分层的签名。
A portion of the upper main-sequence stars, called chemically peculiar (CP) stars, show significant abundance anomalies mainly due to atomic diffusion of chemical elements within the stellar atmospheres of these stars. Slowly rotating CP stars may have hydrodynamically stable atmospheres where the competition between the gravitational and radiative forces leads to atomic diffusion that can be responsible for the abundance peculiarities observed in CP stars. Recently, project VeSElkA (Vertical Stratification of Element Abundances) was initiated with the aim to detect and study the vertical stratification of element abundances in the atmospheres of CP stars. Some results from abundance analysis of several slowly rotating (V$\sin{i}$< 40 km/s) CP stars observed recently with ESPaDOnS are presented here. Signatures of vertical abundance stratification for several chemical elements have been found in the stellar atmospheres of HD~22920, HD~41076, HD~95608, HD~116235, HD~148330 and HD~157087.
