原行星状星云不是具有密近双星中心星的行星状星云的前身
Proto-Planetary Nebulae Are Not the Precursors of Planetary Nebulae With Close Binary Central Stars
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中文总结 AI 辅助
本文探讨原行星状星云是否为密近双星中心星行星状星云的前身,发现尽管其形态受强烈塑造,但两者关联不大,并讨论了演化路径与替代方案。
中文摘要 AI 辅助
原行星状星云被认为是AGB星与行星状星云之间的演化纽带。它们具备这种纽带所预期的许多物理特征,并为这些天体的演化过程提供了宝贵信息。原行星状星云的一个重要特征是普遍存在非常强的双极和点对称形态。在行星状星云中,这些形状被广泛认为是双星伴星塑造的结果。实际上,多项研究已表明,行星状星云中强烈的轴向或点对称性与经历过共同包层阶段的密近双星中心星系统之间存在关联。在此,我们探讨观测到的原行星状星云是否可能是具有密近双星中心星的行星状星云的前身。我们发现,尽管原行星状星云受到强烈塑造,但这种情况不太可能成立。我们还讨论了演化至密近双星的可能性以及其他替代方案。
英文摘要
Proto-planetary nebulae are considered to be the evolutionary link between AGB stars and planetary nebulae. They possess many of the physical characteristics expected of such a link and provide valuable information about the evolutionary process in these objects. One important characteristic of proto-planetary nebulae is the prevalence of very strong bipolar and point-symmetric morphologies. In planetary nebulae, these shapes are widely considered to be the result of shaping by a binary companion. Indeed, a number of studies have shown links between strong axial or point-symmetry in planetary nebulae and close binary central star systems that have gone through a common envelope phase. Here, we explore whether the observed proto-planetary nebulae may be the progenitors of planetary nebulae with close binary central stars. We find that despite the strong shaping of proto-planetary nebulae this is unlikely to be the case. We also discuss options for evolution to close binaries and the alternatives.
发表机构
- Valparaiso University(瓦帕莱索大学)
- Instituto de Astrofísica de Canarias(加那利群岛天体物理研究所)
- Universidad de La Laguna(拉古纳大学)
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