论文标题
利用模拟的几何反照率光谱数据库，用于岩石外球星大气的光度表征
Utilizing a Database of Simulated Geometric Albedo Spectra for Photometric Characterization of Rocky Exoplanet Atmospheres
论文作者
论文摘要
为了预期未来的旗舰任务，重点是实现岩石系外行星的直接成像的目标，我们开发了一个模型数据库，以帮助社区研究各种岩石行星氛围的潜在光谱特征。使用公共可用的行星光谱发电机（PSG），我们在7维参数空间上计算了141,600个岩石外球星的网格。使用此网格，我们进行了颜色分析，以寻求识别最有用的近硫酸盐和红色或近红外光度随访通道，以与绿色（发现）光谱通道结合使用。我们发现，在0.4 um，0.58 um和（大约）0.8UM处的过滤器结合在一起，能够区分中等到高浓度的四种不同显性吸收成分的大气，并在10 Parsec上观察至少10小时，该恒星使用15米级级别的空间望远镜观察到10个小时。但是，与太阳系岩石体类似的更为中等的丰度将更具挑战性。我们建议将来寻求通过颜色单独将直接成像的岩石系外行星来表征的未来任务进一步将多波段光度法视为行星特征的第一个歧视器。
In anticipation of future flagship missions focused on the goal of achieving direct imaging of rocky exoplanets, we have developed a database of models to help the community examine the potential spectral characteristics of a broad range of rocky planet atmospheres. Using the publicly available Planetary Spectrum Generator (PSG), we have computed a grid of 141,600 rocky exoplanet geometric albedo spectra across a 7-dimensional parameter space. Using this grid, we have performed a color-color analysis seeking to identify the most useful near-ultraviolet and red or near-infrared photometric followup channels to combine with a green-optical (discovery) spectral channel. We found that a combination of filters at 0.4 um, 0.58 um, and (approx) 0.8um were able to distinguish between atmospheres with moderate-to-high concentrations of four different dominant absorbing constituents, given at least 10 hours of observation on a star at 10 parsec with a 15-meter-class space telescope; however, more moderate abundances similar to those of Solar System rocky bodies would be more challenging to detect. We recommend that future missions seeking to characterize directly imaged rocky exoplanets by colors alone further consider multi-band photometry as a first discriminator for planetary characteristics.
