Unusually bright 12CO(3-2) condensations in the tidally perturbed Small Magellanic Cloud "tail"
Unusually bright 12CO(3-2) condensations in the tidally perturbed Small Magellanic Cloud "tail"
复制标题
受潮汐扰动的小麦哲伦星云“尾部”中异常明亮的 12CO(3-2) 凝结
DOI：
10.1093/pasj/pst006
复制
发表时间：
2014
影响因子：
2.3
通讯作者：
S.
中科院分区：
文献类型：
--
作者：
Muller;E.;Mizuno;N.;Minamidani;T.;Kawamura;A.;Rosie Chen;C.-H.;Indebetouw;R.;Enokiya;R.;Fukui;Y.;Gordon;K.;Hayakawa;T.;Mizuno;Y.;Murai;M.;Okuda;T.;Onishi;T.;Tachihara;K.;Takekoshi;T.;Yamamoto;H.;and Yoshiike;S.
我们报告最近的观测分子云在潮汐麦哲伦桥，特别是，10 kpc长，潮汐延长“尾巴”的小麦哲伦云。特别是，我们确定了一个异常高的12 CO（3-2）/12 CO（1-0）的比例为2-3比1，对其中一个云，这表明一个温暖和密集的分子材料与即将或目前的恒星形成。我们的106 pc分辨率观测表明，目标云只与明亮的24 μm发射区有一般的相关性，偶尔会偏移1015 pc。这些发现支持了这样一种假设，即恒星正在这个独特的潮汐细丝附近活跃地产生，在当前的时代，星星的形成正在以一系列的进化阶段或速率进行。
We report on recent observations of molecular clouds in the tidal Magellanic Bridge; specifically, the ∼kpc-long, tidally extended “tail” of the Small Magellanic Cloud. In particular, we identify an unusually high12CO(3–2)/12CO(1–0) ratio of 2–3 to 1, toward one of the clouds, suggesting a warm and dense molecular material associated with imminent or current formation of stars. Our ∼ 6 pc-resolution observations show that the target clouds have only a general correlation with bright 24 μm emission regions, occasionally offset by up to ∼ 15 pc. These detections support the scenario that stars are actively being created in this uniquely nearby tidal filament, in the present epoch, and that star formation is ongoing at a range of evolutionary stages or rates.