Young stars are usually excluded from planet searches because they have intense magnetic fields that generate a range of phenomena known collectively as stellar activity, including flares and spots.
搜寻行星时通常把年轻的恒星排除在外，因为它们有强烈的磁场，会产生包括耀斑在内的恒星磁活动，这使得天文学家很难分辨行星和活动信号。
The relation between stellar chromospheric activity and rotation of evolution stars have a good relativity.
演化恒星的色球活动与恒星自转周期间存在很好的相关性。
The rising red dwarf star shows expected stellar magnetic activity which includes dramatic and violent prominences .
上升中的红矮星有著可预期的磁场活动，包含了激烈的日珥现象。
The rising red dwarf star shows expected stellar magnetic activity which includes dramatic and violent prominences .
上升中的红矮星有著可预期的磁场活动，包含了激烈的日珥现象。
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