Description: 恆星的有效溫度指的是，如果我們假設這顆恆星是一個理論上的完美輻射體，也就是“黑體”，它具有與該恆星相同的表面積和總光輸出，那麼這個黑體的溫度就是恆星的有效溫度。

恆星有不同的溫度層，其中幾個溫度層貢獻了我們最終接收到的星光。天文學家通常發現，用一個簡單得多的模型來表示恆星是非常有用的，這個模型就是被稱為 "黑體 "的理想發光體。黑體的總能量輸出完全取決於兩個參數：溫度和表面積。恆星的有效溫度就是與恆星具有相同表面積和相同總能量輸出的黑體的溫度。

有效溫度是一種衡量恆星外層不同區域對總光輸出平均貢獻的方法，其數值通常與恆星的光球溫度非常接近。光球是恆星表面的一層，它是恆星大部分輻射光的來源。

Related Terms:

• 黑體輻射
• 光球
• 光譜類型
• 溫度

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

The OAE Multilingual Glossary is a project of the IAU Office of Astronomy for Education (OAE) in collaboration with the IAU Office of Astronomy Outreach (OAO). The terms and definitions were chosen, written and reviewed by a collective effort from the OAE, the OAE Centers and Nodes, the OAE National Astronomy Education Coordinators (NAECs) and other volunteers. You can find a full list of credits here. All glossary terms and their definitions are released under a Creative Commons CC BY-4.0 license and should be credited to "IAU OAE".