A MILLIMETER-WAVE INTERFEROMETRIC STUDY OF DUST AND CO DISKS AROUND LATE SPECTRAL TYPE STARS IN TAURUS-AURIGA
A MILLIMETER-WAVE INTERFEROMETRIC STUDY OF DUST AND CO DISKS AROUND LATE SPECTRAL TYPE STARS IN TAURUS-AURIGA
复制标题
金牛座-御夫座晚光谱型恒星周围尘埃和二氧化碳盘的毫米波干涉研究
DOI：
10.1088/0004-637x/701/1/698
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
Russel J. White
中科院分区：
文献类型：
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作者：
G. Schaefer;A. Dutrey;S. Guilloteau;M. Simon;Russel J. White
我们对金牛座-御夫座恒星形成区的23颗前主序星进行了新的毫米巡天。该项目的主要目标是确定晚光谱类型（M* 0.7 M返）恒星周围的星周盘。我们使用IRAM Plateau de Bure干涉仪在1.3 mm、2.7 mm和CO J = 1-0和J = 2-1线处获得观测结果。我们检测到8个源的连续发射，与新的检测CIDA-1和CIDA-8在1.3毫米。总体而言，我们发现，恒星周围的拱盘光谱类型晚于M2往往有较小的毫米连续通量比周围的早期类型的恒星。我们还提出了四个检测盘在其CO线发射（LkHα 358，GO Tau，哈洛6-13，IRAS 04385+2550）。通过映射的旋转的解决CO排放的拱星盘，我们得到的中心恒星的动力学质量的估计。
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.