Magnetic activity of cool stars in the Hertzsprung-Russell diagram

被引：0

作者：

Schmitt, J. H. M. M. ^{[1
]}

机构：

[1] Hamburger Sternwarte, D-21029 Hamburg, Germany

来源：

COMPARATIVE MAGNETIC MINIMA: CHARACTERIZING QUIET TIMES IN THE SUN AND STARS | 2012年 / 286期

关键词：

Sun: activity; stars: activity; stars: coronae; X-rays: stars; CORONAL ACTIVITY CYCLES; X-RAY-EMISSION;

D O I：

10.1017/S1743921312005005

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

I review the X-ray emission from cool stars with outer convection zones in comparison to the Sun with a focus on the properties of low-activity stars. I present the recent results of long-term X-ray monitoring which demonstrate the existence of X-ray cycles on stars with known calcium cycles. The evidence of a minimum stellar X-ray flux is presented and arguments are put forward for the view that the Sun in its extended minimum between 2008 - 2009 behaved very much like a Maunder-minimum Sun.

引用

页码：296 / 306

页数：11

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