Glossary term: 水平分支
Description: 中心核反应将氦合成为碳的恒星被称为水平分支恒星。之所以叫这个名字，是因为这些恒星位于赫罗图中的水平支上，表现为 "表面 "温度（有效温度）分布在一定范围，但光度几乎恒定。这些恒星的演化已经超过了红巨星阶段，质量（外层）损失量不等。质量不超过八倍太阳质量的主序星会经历这一演化阶段。
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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
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".
