论文标题
LYα和He 10830 A在GJ3470B的Transits中吸收的全局3D流体动力模型
Global 3D hydrodynamic modeling of absorption in Lyα and He 10830 A lines at transits of GJ3470b
论文作者
论文摘要
最近在23S-23p的亚稳态氦转变中观察到了温暖的Neptune GJ3470b，在[-40的多普勒速度范围内吸收约1％； 10] km/s。除了先前在LYα中检测到该线的蓝色和红色翅膀的深度为20-40％的吸收，它为当前模型的模拟和测试提供了一个复杂的目标。获得的结果表明，这两条线的吸收均来自膨胀的上行大气与恒星等离子体风的相互作用，从而限制了恒星等离子体参数和行星大气中的氦气丰度。
Warm Neptune GJ3470b has been recently observed in 23S-23P transition of metastable helium, yielding absorption of about 1% in Doppler velocity range of [-40; 10] km/s. Along with previous detection of absorption in Lyα with depth of 20-40% in the blue and red wings of the line, it offers a complex target for simulation and testing of the current models. Obtained results suggest that absorption in both these lines comes from interaction of expanding upper planetary atmosphere with stellar plasma wind, allowing to constrain the stellar plasma parameters and the helium abundance in planet atmosphere.
