Stellar activity, differential rotation, and exoplanets

被引：0
|
作者：
Lanza, A. F. [1 ]
机构：
[1] INAF Osservatorio Astrofis Catania, I-95123 Catania, Italy
来源：
PHYSICS OF SUN AND STAR SPOTS | 2011年 / 273期
关键词：
Stars: activity; stars: magnetic fields; stars: spots; stars: rotation; planetary systems; COROT SPACE MISSION; TRANSITING EXOPLANETS; MAGNETIC ACTIVITY; PHOTOSPHERIC ACTIVITY; HOT JUPITERS; SHORT-TERM; PLANET; VARIABILITY; STARS; SUN;
D O I：
10.1017/S1743921311015067
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The photospheric spot activity of some of the stars with transiting planets discovered by the CoRoT space experiment is reviewed. Their out-of-transit light modulations are fitted by a spot model previously tested with the total solar irradiance variations. Tins approach allows us to study the longitude distribution of the spotted area and its variations versus time during the five months of a typical CoRoT time series. The migration of the spots in longitude provides a lower limit for the surface differential rotation, while the variation of the total spotted area can be used to search for short-term cycles akin the solar Rieger cycles. The possible impact of a close-in giant planet on stellar activity is also discussed.
引用
收藏
页码：89 / 95
页数：7
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