论文标题
行星光度问题：“缺失行星”和情节增生的观察结果
The Planetary Luminosity Problem: "Missing Planets" and the Observational Consequences of Episodic Accretion
论文作者
论文摘要
如果被解释为巨型行星的路标，则螺旋臂和大型中央清除率的高发生率表明，在10--300 \，au的轨道分离处，气体巨人通常是年轻恒星（$ <$ <$ <$ <$ <$ <$ <$ <$ <$ <$ <$ <$ <$ <$ <$ <$ <$ <$ myr）。但是，试图将这个巨大的行星人口直接形象为更成熟的恒星（$> 10 $ \，MYR）的同伴几乎没有成功。如果大多数巨型行星形成“冷启动”，即，通过在组装质量时散发出大部分的地层能量，使它们足够微弱以在以后的时间散发出来，就可以解释这种差异。在这种情况下，巨型行星应在早期，积聚阶段亮，但很少通过直接成像技术检测到行星。在这里，我们探讨了促进行星的低检测率是通过圆周磁盘发作的产生增强率的结果。我们还探讨了绕着Herbig Ae Star HD绕的同伴〜142527可能是一个经历了这种吸收爆发的巨型星球。
The high occurrence rates of spiral arms and large central clearings in protoplanetary disks, if interpreted as signposts of giant planets, indicate that gas giants form commonly as companions to young stars ($<$ few Myr) at orbital separations of 10--300\,au. However, attempts to directly image this giant planet population as companions to more mature stars ($> 10$\, Myr) have yielded few successes. This discrepancy could be explained if most giant planets form "cold start," i.e., by radiating away much of their formation energy as they assemble their mass, rendering them faint enough to elude detection at later times. In that case, giant planets should be bright at early times, during their accretion phase, and yet forming planets are detected only rarely through direct imaging techniques. Here we explore the possibility that the low detection rate of accreting planets is the result of episodic accretion through a circumplanetary disk. We also explore the possibility that the companion orbiting the Herbig Ae star HD~142527 may be a giant planet undergoing such an accretion outburst.
