论文标题
关节径向速度和直接成像行星产量计算:I。自吻的行星种群
Joint Radial Velocity and Direct Imaging Planet Yield Calculations: I. Self-consistent Planet Populations
论文作者
论文摘要
行星屈服计算可用于告知空间观测值的目标选择策略和科学运营。预计即将到来的和提议的NASA任务,例如广阔的红外调查望远镜(WFIRST),可居住的系外行星成像任务(HABEX)和大型紫外线/光学/IR测量师(Luvoir),预计将配备敏感的冠状动脉和/或/或星际。我们正在开发一套数值模拟套件,以量化地面径向速度(RV)调查的程度可以提高直接成像任务的检测效率。在本文中,我们讨论了估计行星产量的过程中的第一步:生成与多种检测方法观察到的发生率一致的合成行星系统。为了试图与轨道行星自言自语填充恒星,发现出现率(质量,半马约尔轴)的幼稚推断会导致不现实的Neptune-Mass行星数量不切实际,超出了冰线($ a \ gtrsim 5 $ au),导致动态互动,从而导致动态互动,从而使ORBITS ORBITS ORBITS ORBITS。我们对基于相互山半径分离的多行星系统施加了稳定性标准。考虑到含有Jovian质量和海王星质量行星的紧凑型构型的影响会导致在大半径上可能存在的陆地行星数量明显抑制。该结果对行星屈服计算有明显的影响,尤其是在可通过高对比度成像和微透镜的区域中。我们开发的动态紧凑型配置和发生率可以作为输入纳入关节RV和直接成像收益率计算,以对具有未来任务的可检测行星数量限制有意义的限制。
Planet yield calculations may be used to inform the target selection strategy and science operations of space observatories. Forthcoming and proposed NASA missions, such as the Wide-Field Infrared Survey Telescope (WFIRST), the Habitable Exoplanet Imaging Mission (HabEx), and the Large UV/Optical/IR Surveyor (LUVOIR), are expected to be equipped with sensitive coronagraphs and/or starshades. We are developing a suite of numerical simulations to quantify the extent to which ground-based radial velocity (RV) surveys could boost the detection efficiency of direct imaging missions. In this paper, we discuss the first step in the process of estimating planet yields: generating synthetic planetary systems consistent with observed occurrence rates from multiple detection methods. In an attempt to self-consistently populate stars with orbiting planets, it is found that naive extrapolation of occurrence rates (mass, semi-major axis) results in an unrealistically large number-density of Neptune-mass planets beyond the ice-line ($a \gtrsim 5$au), causing dynamic interactions that would destabilize orbits. We impose a stability criterion for multi-planet systems based on mutual Hill radii separation. Considering the influence of compact configurations containing Jovian-mass and Neptune-mass planets results in a marked suppression in the number of terrestrial planets that can exist at large radii. This result has a pronounced impact on planet yield calculations particularly in regions accessible to high-contrast imaging and microlensing. The dynamically compact configurations and occurrence rates that we develop may be incorporated as input into joint RV and direct imaging yield calculations to place meaningful limits on the number of detectable planets with future missions.