Properties of the Closest Young Binaries. I. DF Tau’s Unequal Circumstellar Disk Evolution
Properties of the Closest Young Binaries. I. DF Tau’s Unequal Circumstellar Disk Evolution
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最近的年轻双星的性质 I. DF Tau 的不等周星盘演化
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
M. Simon
中科院分区：
文献类型：
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作者：
Thomas Allen;L. Prato;N. Wright;G. Schaefer;L. Biddle;B. Skiff;I. Avilez;R. Muzzio;M. Simon
我们展示了DF Tau的高分辨率、空间分辨率、近红外光谱和成像，DF Tau是一个年轻的、低质量的、位于金牛座恒星形成区域的视觉双星。利用这些数据，我们为系统提供了更精确的轨道解，确定了组分光谱类型、径向速度、遮挡和值，并构建了单个光谱能量分布。我们估计这两颗恒星的质量是。我们发现DF Tau A和DF Tau B的星周特性明显不同：圆盘的证据，如近红外过量和吸积特征，在主星上明显存在，而在次星上却没有。此外，旋转周期测量结果表明，次级星的旋转速度明显快于初级星。我们在磁盘锁定的框架中解释这些结果，并认为DF Tau A是年轻系统中磁盘调制旋转的一个例子。DF - Tau星系对我们关于宇宙盘的形成和演化的假设提出了根本性的问题。
We present high-resolution, spatially resolved, near-infrared spectroscopy and imaging of the two components of DF Tau, a young, low-mass, visual binary in the Taurus star-forming region. With these data, we provide a more precise orbital solution for the system, determine component spectral types, radial velocity, veiling and values, and construct individual spectral energy distributions. We estimate the masses of both stars to be . We find markedly different circumstellar properties for DF Tau A and B: evidence for a disk, such as near-infrared excess and accretion signatures, is clearly present for the primary, while it is absent for the secondary. Additionally, the and rotation period measurements show that the secondary is rotating significantly more rapidly than the primary. We interpret these results in the framework of disk-locking and argue that DF Tau A is an example of disk-modulated rotation in a young system. The DF Tau system raises fundamental questions about our assumptions of universal disk formation and evolution.
影响因子：
6.5
作者：
Baraffe, Isabelle;Homeier, Derek;Chabrier, Gilles
通讯作者：
Chabrier, Gilles