We report the detection of dust emission at submillimeter wavelengths from HD 107146, a G2 V star with an age estimated to lie between 80 and 200 Myr. The emission is resolved at 450μm with a size 300 AU x 210 AU. A fit to the spectral energy distribution gives a dust temperature of 51 K and a dust mass of 0.10 M_⊕. No excess emission above the photosphere was detected at 18 μm, showing that there is very little warm dust and implying the presence of a large inner hole, at least 31 AU (～1″) in radius, around the star. The properties of this star-disk system are compared with similar observations of other systems. We also discuss prospects for future observations that may be able to determine whether the inner hole is maintained by the dynamical effect of an unseen orbiting companion.
展开▼
机译：我们报告了从HD 107146（一颗G2 V恒星，年龄估计在80至200 Myr之间）检测到的亚毫米波长处的尘埃排放。发射分辨率为450μm，尺寸为300 AU x 210 AU。对光谱能量分布的拟合给出了粉尘温度为51 K和粉尘质量为0.10M_⊕。在18μm处未检测到光球上方的过量发射，表明几乎没有温暖的尘埃，这意味着在恒星周围存在一个大内孔，半径至少为31 AU（〜1“）。将该星盘系统的属性与其他系统的类似观察结果进行了比较。我们还讨论了未来观察的前景，这些前景可能能够确定内孔是否由看不见的轨道伴星的动力作用所保持。
展开▼
