行星状星云研究:过去、现在和未来

IF 3.2 Q2 ASTRONOMY & ASTROPHYSICS
Galaxies Pub Date : 2024-07-17 DOI:10.3390/galaxies12040039
Sun Kwok
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引用次数: 0

摘要

我们回顾了我们对行星状星云现象及其在恒星演化中的地位的认识的演变过程。我们讨论了导致我们目前对中心恒星演化和星云形成的理解的历史步骤。最近的光学成像、X射线、紫外线、红外线、毫米波和无线电观测使我们对行星状星云的结构有了更复杂的认识。光学亮区有多种外壳结构(边缘、外壳、冠和光环),这可以在相互作用风的框架内加以理解。然而,在原行星状星云阶段出现的双极和多极结构的物理机制尚未确定。我们对行星状星云的形态分类受到灵敏度、方向和视场覆盖范围的影响,双极或多极星云的比例可能比通常假设的要高得多。光学上明亮的双极叶可能代表了中性包层被准直快速风切割出来的低密度、电离束缚的空腔。行星状星云是活跃合成复杂有机化合物的场所,这表明行星状星云在银河系的化学富集过程中扮演着重要角色。本文讨论了未来可能的研究方向。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Planetary Nebulae Research: Past, Present, and Future
We review the evolution of our understanding of the planetary nebulae phenomenon and their place in the scheme of stellar evolution. The historical steps leading to our current understanding of central star evolution and nebular formation are discussed. Recent optical imaging, X-ray, ultraviolet, infrared, millimeter wave, and radio observations have led to a much more complex picture of the structure of planetary nebulae. The optically bright regions have multiple shell structures (rims, shells, crowns, and haloes), which can be understood within the interacting winds framework. However, the physical mechanism responsible for bipolar and multipolar structures that emerged during the proto-planetary nebulae phase is yet to be identified. Our morphological classifications of planetary nebulae are hampered by the effects of sensitivity, orientation, and field-of-view coverage, and the fraction of bipolar or multipolar nebulae may be much higher than commonly assumed. The optically bright bipolar lobes may represent low-density, ionization-bounded cavities carved out of a neutral envelope by collimated fast winds. Planetary nebulae are sites of active synthesis of complex organic compounds, suggesting that planetary nebulae play a major role in the chemical enrichment of the Galaxy. Possible avenues of future advancement are discussed.
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来源期刊
Galaxies
Galaxies Physics and Astronomy-Astronomy and Astrophysics
CiteScore
4.90
自引率
12.00%
发文量
100
审稿时长
11 weeks
期刊介绍: Es una revista internacional de acceso abierto revisada por pares que proporciona un foro avanzado para estudios relacionados con astronomía, astrofísica y cosmología. Areas temáticas Astronomía Astrofísica Cosmología Astronomía observacional: radio, infrarrojo, óptico, rayos X, neutrino, etc. Ciencia planetaria Equipos y tecnologías de astronomía. Ingeniería Aeroespacial Análisis de datos astronómicos. Astroquímica y Astrobiología. Arqueoastronomía Historia de la astronomía y cosmología. Problemas filosóficos en cosmología.
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