ROSAT X-Ray Study of the Chamaeleon I Dark Cloud. I. The Stellar Population
ROSAT X-Ray Study of the Chamaeleon I Dark Cloud. I. The Stellar Population
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Chamaeleon I 暗云的 ROSAT X 射线研究。
DOI：
10.1086/173264
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发表时间：
1993
期刊：
影响因子：
--
通讯作者：
J. Guibert
中科院分区：
文献类型：
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作者：
E. Feigelson;S. Casanova;T. Montmerle;J. Guibert
展示了用 ROSAT 位置敏感正比计数器获得的 Chamaeleon I 恒星形成云的两张软 X 射线图像。已发现 70 个可靠的 X 射线源和 19 个可能的附加 X 射线源。其中百分之八十的来源肯定或可能与云中形成的金牛座 T 星有关。提出了 19 到 39 颗新的弱金牛座 T (WTT) 恒星，当通过光谱证实时，它们将显着扩大已知的云种群。单个T Tauri X射线光度范围为～6×10 28 至～2×10 31 ergs s -1 (0.4-2.5 keV)，或～10 2 -10 4 倍太阳水平。 ROSAT 图像比早期的爱因斯坦天文台云图像敏感一个数量级，恒星识别率高出 3-4 倍
Two soft X-ray images of the Chamaeleon I star-forming cloud obtained with the ROSAT Position Sensitive Proportional Counter are presented. Seventy reliable, and 19 possible additional, X-ray sources are found. Eighty percent of these sources are certainly or probably identified with T Tauri stars formed in the cloud. Nineteen to 39 are proposed new weak T Tauri (WTT) stars which, when confirmed by optical spectroscopy, will significantly enlarge the known cloud population. Individual T Tauri X-ray luminosities range from ∼6×10 28 to ∼2×10 31 ergs s −1 (0.4-2.5 keV), or ∼10 2 -10 4 times solar levels. The ROSAT images are a order of magnitude more sensitive, with 3-4 times more stellar identifications, than earlier Einstein Observatory images of the cloud