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題名 | Young Stellar Population in the Lupus 3 Molecular Cloud=豺狼座第三號分子雲中的年輕恆星 |
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作者 | 黃峰毅; 陳文屏; 蕭文珊; Huang, Fong-yi; Chen, Weng-ping; Hsiao, Wen-shan; |
期刊 | 臺北天文館學報 |
出版日期 | 20061200 |
卷期 | 4 民95.12 |
頁次 | 頁27-36 |
分類號 | 323.8 |
語文 | eng |
關鍵詞 | 恆星形成; 金牛座T型星; Star formation; T tauri stars; |
中文摘要 | 我們利用UKST的Hα巡天計劃之影像資料庫,來尋找具有發射線的星球。研究的目標是豺狼座恆星形成區,為距離地球最近的恆星形成區之一。我們以豺狼座第三號分子雲中的兩顆赫比Ae星為中心,分析了視野大小為30 × 30角分的影像,挑選出46顆具Hα發射線之傳統金牛座T型星候選者,其中22顆為新發現的。這22顆當中的其中7顆星位於分子雲以外,它們的2MASS近紅外顏色與傳統金牛座T型星相符,後續光譜觀測發現至少有兩顆乃傳統金牛座T型星,表示該地區恆星形成活動不僅限於分子雲範圍,而應該重新檢討其恆星形成歷史。我們的結果顯示UKST的Hα影像資料庫,若配合2MASS資料以及可見光光譜觀測,對於研究恆星形成區的年輕恆星非常有價值。 |
英文摘要 | We report a pilot study to identify emission-line stars by use of the image database of the hydrogen-alpha survey by the United Kingdom Schmidt Telescope. The Lupus dark clouds are among the nearest star-forming regions. We analyzed a 30' × 30' field of the UK Schmidt Hα images centered around the 2 Herbig Ae stars of the Lupus 3 cloud. A list of 46 candidate T Tauri stars have been identified, among which 22 are new identifications. Seven out of these 22 Hα stars are not associated with molecular clouds, and have 2MASS colors suggestive of being classical T Tauri stars. At least two of the candidates have been spectroscopically confirmed to be T Tauri stars, while the rest are late-type dwarfs. This suggests that star formation in Lupus 3 is not limited to association with clouds, and thus the star formation history of the region should be reassessed. The UKST H-alpha database proves to be very useful, particularly in combination with 2MASS and optical spectroscopy, in study of the young stellar population in star-forming regions. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。