Glossary term: 金牛T星
Description: 金牛T星是一類低質量的年輕變星，以金牛座的恆星形成區中的原型變星T-Tauri命名。它們的 "表面 "溫度（有效溫度）與相同質量的 F、G、K 和 M 光譜型主序星相似，但由於直徑較大，它們的亮度要高得多。這些正在收縮的年輕恆星尚未開始進行氫核聚變，其能量來源於引力收縮釋放的重力勢能。金牛T星可通過不規則的光學亮度變化和光譜來識別。它們會發出強烈且多變的X射線和射電波。亮度的變化部分是由於圍繞金牛T星的盤狀星週物質中的團狀結構引起的。
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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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