论文标题
附近恒星周围可居住区系外行星的直接中国探测性
The Direct Mid-Infrared Detectability of Habitable-zone Exoplanets Around Nearby Stars
论文作者
论文摘要
目前，最接近几颗恒星的宜居区域内的巨型行星可以用地面望远镜成像。在接下来的十年中，极大的望远镜（ELT）将开始对附近恒星的宜居区域进行想象，这些恒星具有更高的灵敏度$ - $ - $可能是最接近的恒星周围的成像exo-Earths。为了确定未来十年中最有前途的观测候选者，我们基于可用的大气和进化模型，建立了一个理论框架，用于将地球$ - $ - $ - $ - $ - $ - $ $ - $ - $ - $ - $ - $ - $ - $ - $ - $。在83个最接近的BAFGK型星星中，我们在10 pc中选择了37个FGK类型的恒星，在30 pc中，在30 pc中选择了34个ba型恒星，并具有可靠的年龄约束。我们根据行星有效温度的参数模型根据恒星的亮度，距离和年龄以及行星的轨道半轴轴，半径和反照率对目标进行优先级。然后，我们预测最可能的行星可以通过当前的8米望远镜和39米的ELT检测到，每颗星的观察力最高为100小时。将其汇总在一起，我们建议检测横跨非常遥远的年轻巨型行星的可居住区系带有可居住区系外行星所需的观察时间。然后，我们建议当前望远镜和即将到来的ELT的理想初始目标。
Giant planets within the habitable zones of the closest several stars can currently be imaged with ground-based telescopes. Within the next decade, the Extremely Large Telescopes (ELTs) will begin to image the habitable zones of a greater number of nearby stars with much higher sensitivity$-$ potentially imaging exo-Earths around the closest stars. To determine the most promising candidates for observations over the next decade, we establish a theoretical framework for the direct detectability of Earth$-$ to super-Jovian-mass exoplanets in the mid-infrared based on available atmospheric and evolutionary models. Of the 83 closest BAFGK type stars, we select 37 FGK type stars within 10 pc and 34 BA type stars within 30 pc with reliable age constraints. We prioritize targets based on a parametric model of a planet's effective temperature based on a star's luminosity, distance, and age, and on the planet's orbital semi-major axis, radius, and albedo. We then predict the most likely planets to be detectable with current 8-meter telescopes and with a 39-m ELT with up to 100 hours of observation per star. Putting this together, we recommend observation times needed for the detection of habitable-zone exoplanets spanning the range of very nearby temperate Earth-sized planets to more distant young giant planets. We then recommend ideal initial targets for current telescopes and the upcoming ELTs.
