标题： 巨星中的激微波放大研究 显示英文标题

标题： Maser Studies in Evolved Stars

摘要： 高分辨率的激射发射图谱为了解晚期恒星周围包层中的过程提供了非常详细的信息。AGB（渐近巨星分支）恒星周围的最内层壳层提供了SiO激射器的特别详细的图像。为了更好地限制模型，正在取得显著进展，以提供天文学上对齐的多跃迁同时观测这些激射器。鉴于大量高质量数据的可用性，现在应该开发模型来全面解释所有激射特征（空间分布、变异性等）。新一代仪器（如VERA、VSOP-2）、新的观测技术（频率-相位传递）以及新模型有望在这个主题上带来重要的知识改进。 显示英文摘要

摘要： High resolution maps of maser emission provide very detailed information on processes occurring in circumstellar envelopes of late-type stars. A particularly detailed picture of the innermost shells around AGB stars is provided by SiO masers. Considerable progress is being made to provide astrometrically aligned multi-transition simultaneous observations of these masers, which are needed to better constrain the models. In view of the large amount of high quality data available, models should now be developed to fully explain all maser characteristics together (spatial distribution, variability, etc). New generation instruments (VERA, VSOP-2), new observational techniques (frequency-phase transfer), and new models promise important improvements of our knowledge on this topic.