頁籤選單縮合
題名 | 消散雲氣中的疏散星團=Open Clusters in a Dispersing Cloud |
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作者 | 陳慧真; 高仲明; | 書刊名 | 臺北天文館學報 |
卷期 | 3 民94.12 |
頁次 | 頁35-39 |
分類號 | 323.84 |
關鍵詞 | 多體運動問題; 分子雲; 模擬; 疏散星團; N-body problem; Molecular cloud; Simulation; Open cluster; |
語文 | 中文(Chinese) |
中文摘要 | 星團生成於分子雲中,而根據觀測並沒有這麼多的星團存在銀河系中,因此可知其生成後的存活率很低,其原因可能來自於母雲氣消散時,整個系統的重力位能井變淺,使得恆星的動能相對過大造成逃逸。藉由S. Aarseth 的NBODY2 程式,我們試圖探討在消散雲氣中疏散星團的行為模式。預期中,當雲氣快速消散時,星團將會被毀滅或蒸發。然而我們發現,即使當雲氣的消散速度很大時,星團並不會被完全毀滅。 |
英文摘要 | Stellar clusters are born within giant molecular clouds. The survival rate of infant clusters is low (Lada and Lada 2003). The reason is alluded to cloud dispersion. Adopting the code NBODY2 developed by Aarseth, we study the behaviour of an open cluster in a dispersing molecular cloud. It is expected that the cluster may be destroyed or evaporated when the cloud disperses rapidly. However, we find that the cluster may not be disrupted completely even if the dispersion rate of the molecular cloud is fairly large (0.6 million years compared with respect to the lifetime of the molecular clouds, 20 to 50 million years). |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。