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Glossary term: 恒星形成

Description: 恒星的诞生源于巨型分子云中被称为核心的低温致密区域的引力坍缩,这些区域大多位于星系的旋臂中。恒星的形成涉及复杂的物理过程,发生在不同的尺度上,由引力、压力、辐射、磁场、湍流、化学等作用造成,其中有些作用至今仍不甚明了。根据母云的质量和形成阶段的吸积过程,恒星的质量从 0.08 到几百个太阳质量不等。大多数恒星都不是孤立形成的,而是恒星群的一部分。在形成阶段,中心恒星周围会形成一个原恒星盘,最终为行星的形成提供原材料。

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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

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Related Media


一团乌云遮住了背景恒星。前方,两股物质喷流从中心物体向相反方向喷射

见证一颗恒星的诞生

Caption: 阿塔卡马大毫米波/亚毫米波阵列(ALMA)和欧洲南方天文台新技术望远镜(NTT)拍摄的射电和可见光组合图像,揭示了赫比格-哈罗天体 HH 46/47 中一颗恒星的诞生过程。橙色和绿色的 ALMA 数据揭示了来自中央原恒星的高能喷流,由于尘埃遮挡和高密度气体的存在,该喷流在可见光波段被掩盖。粉色和紫色的 NTT 数据突出显示了喷流向观测者发射的可见光。
Credit: ESO/ALMA (ESO/NAOJ/NRAO)/H.Arce. 致谢:Bo Reipurth credit link

License: CC-BY-3.0 Creative Commons Attribution 3.0 Unported icons


年轻恒星沿着气体带形成

恒星诞生环境

Caption: 使用阿塔卡马大型毫米/亚毫米波阵(ALMA)和甚大阵(VLA),拍摄了猎户座分子云中多颗原恒星形成的快照,更仔细地观察了每颗原恒星。对于恒星形成的过程和早期阶段,以及恒星从中形成的母云所产生的影响,这样的图像提供了独特的见解。
Credit: ALMA (ESO/NAOJ/NRAO), J. Tobin; NRAO/AUI/NSF, S. Dagnello; Herschel/ESA credit link

License: CC-BY-3.0 Creative Commons Attribution 3.0 Unported icons