CYCLES IN OTHERS STARS

机译：他人之星的循环

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The index mostly used to measure stellar activity is the one combining Ca Ⅱ H and K line fluxes. These lines, which are formed in the stellar chromosphere, are not particularly adequate to study cool stars, which are intrinsically faint and red. In this work we used observations of 69 southern stars to study different indexes of activity. We found that an index built from Hα can be used to study activity through the whole spectral range from F to M stars. We also built indexes from the Na D lines and the Ca Ⅰ 4227 A line, and found that, for stars with (B ―V) < 1.15, these indexes are good color indicators, and only for stars with (B―V)> 1.15 these indexes correlate with activity.

机译：主要用于测量恒星活动的指标是结合CaⅡH和K线通量的指标。这些在恒星色球中形成的线并不特别适合研究本质上微弱和红色的冷星。在这项工作中，我们使用对69个南方恒星的观测来研究不同的活动指数。我们发现，由Hα建立的指数可用于研究从F星到M星的整个光谱范围内的活动。我们还从Na D线和CaⅠ4227 A线建立了指标，发现对于（B ―V）<1.15的恒星，这些指标是良好的颜色指示，仅适用于（B ―V）>的恒星。 1.15这些指标与活动相关。

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来源
《Second Solar Cycle and Space Weather Euroconference Sep 24-29, 2001 Vico Equense, Italy》|2001年|p.91-94|共4页
会议地点 Vico Equense(IT);Vico Equense(IT)
作者
C. Cincunegui; P.J.D. Mauas;
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作者单位

Instituto de Astronomia y Fisica del Espacio, CC.67, Suc.28, 1428 Buenos Aires, Argentina;

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会议组织
原文格式 PDF
正文语种 eng
中图分类天文学;
关键词
solar activity; stellar activity; chromospheres;

机译：太阳活动;恒星活动;色球;

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CYCLES IN OTHERS STARS

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