论文标题
13C17O提出HL Tau盘的重力不稳定
13C17O suggests gravitational instability in the HL Tau disc
论文作者
论文摘要
我们介绍了13C17O J = 3-2向HL Tau Protoplanetary Disc的首次检测。我们发现的气体质量明显高于先前报道的使用C18O发射的气体质量（至少高10倍）。这使观察到的总圆盘质量达到0.2 m，我们认为这是保守的下限。我们对Toomre Q曲线的分析表明，这将椎间盘带入了引力不稳定的状态。不稳定性的径向区域（50-110 AU）与灰尘盘中提出的行星雕刻间隙的位置和气体中的螺旋形成一致。因此，我们建议，如果间隙的起源被确认是由于形成的巨型行星所致，那么它很可能是通过原星盘的重力碎片形成的。
We present the first detection of the 13C17O J=3-2 transition toward the HL Tau protoplanetary disc. We find significantly more gas mass (at least a factor of ten higher) than has been previously reported using C18O emission. This brings the observed total disc mass to 0.2 M, which we consider to be a conservative lower limit. Our analysis of the Toomre Q profile suggests that this brings the disc into the regime of gravitational instability. The radial region of instability (50-110 au) coincides with the location of a proposed planet-carved gap in the dust disc and a spiral in the gas. We, therefore, propose that if the origin of the gap is confirmed to be due to a forming giant planet, then it is likely to have formed via the gravitational fragmentation of the protoplanetary disc.
