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首页> 外文期刊>The Astrophysical journal >A MILLIMETER-WAVE INTERFEROMETRIC STUDY OF DUST AND CO DISKS AROUND LATE SPECTRAL TYPE STARS IN TAURUS-AURIGA
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A MILLIMETER-WAVE INTERFEROMETRIC STUDY OF DUST AND CO DISKS AROUND LATE SPECTRAL TYPE STARS IN TAURUS-AURIGA

机译:金牛座-AURIGA的近光谱型恒星周围尘埃和CO盘的毫米波干涉仪研究

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摘要

We present a new millimeter survey of 23 pre-main-sequence stars in the Taurus-Auriga star-forming region. The main goal of the project was to identify circumstellar disks around stars of late spectral types (M * 0.7?M ☉). We used the IRAM Plateau de Bure Interferometer to obtain observations at 1.3 mm, 2.7 mm, and the CO J = 1-0 and J = 2-1 lines. We detected eight sources in continuum emission, with new detections of CIDA-1 and CIDA-8 at 1.3 mm. Overall, we find that circumstellar disks around stars with spectral types later than M2 tend to have smaller millimeter continuum fluxes than those around earlier type stars. We also present four detections of disks in their CO line emission (LkHα 358, GO Tau, Haro 6-13, IRAS 04385+2550). By mapping the rotation of the resolved CO emission from the circumstellar disks, we obtain estimates of the dynamical mass of the central stars.
机译:我们提出了一项新的毫米波调查,对金牛座-乌里加恒星形成区中的23个主序前恒星进行了测量。该项目的主要目标是识别晚光谱类型(M * 0.7?M☉)的恒星周围的圆盘。我们使用IRAM Plateau de Bure干涉仪获得了1.3 mm,2.7 mm的观测值,CO J = 1-0和J = 2-1线。我们检测到连续排放中的八个源,其中新检测到的CIDA-1和CIDA-8的浓度为1.3 mm。总体而言,我们发现,光谱类型晚于M2的恒星周围的星际圆盘趋向于具有比早期类型的恒星周围的星际圆通量更小的毫米通量。我们还介绍了在CO线发射中检测到的四个磁盘(LkHα358,GO Tau,Haro 6-13,IRAS 04385 + 2550)。通过映射来自星际圆盘的解析出的CO排放的旋转,我们获得了中心恒星动力学质量的估计。

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