研究了AQ And、U Ant和TT Cyg的分离尘壳
The detached dust shells of AQ And, U Ant, and TT Cyg
摘要：
使用Herschel-PACS在三个碳变星周围检测到分离的拱星尘埃壳。其中两个已经知道的基础上，他们的热CO排放和两个是可见的扩展在IRAS成像数据。通过模型拟合新的数据集，推导出物理尺寸，膨胀时间尺度，尘埃温度等。与现有的分子CO材料的比较表明TT Cyg和U Ant的高度相关性，但也发现了与其他观测值的一些明显差异。
英文摘要：
Detached circumstellar dust shells are detected around three carbon variables using Herschel-PACS. Two of them are already known on the basis of their thermal CO emission and two are visible as extensions in IRAS imaging data. By model fits to the new data sets, physical sizes, expansion timescales, dust temperatures, and more are deduced. A comparison with existing molecular CO material shows a high degree of correlation for TT Cyg and U Ant but a few distinct differences with other observables are also found.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
