Glossary term: 對流區
Description: 對流區是恆星內部以對流而非輻射為主要熱量傳輸方式的區域。對流要求特定區域之內的溫差較大。當輻射效率低下時，對流就開始了。
在對流區，恆星深處的熱物質會上升到較冷的區域，在那裡冷卻，然後再下沉。在質量最大的主序星內部，恆星內核是對流區，而外層是輻射區。在與太陽類似的主序星內部，大氣層以下的區域是對流區，而更深的區域則是輻射區。在質量最小的恆星中，從內核到大氣層以下的所有區域都是對流區。
對流運動導致化學元素的大規模混合。當對流到達恆星表面時，會把新合成的元素和同位素輸送到表面，從而在天文學家記錄的光譜中留下印記。
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Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher The translation of this term and its definition is still awaiting approval
This is an automated transliteration of the simplified Chinese translation of this term
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