论文标题
在外部太阳系中搜索巨大的行星，并通过远红外的全套调查
Searching for giant planets in the outer Solar System with far-infrared all-sky surveys
论文作者
论文摘要
我们已经探索了一种方法，可以通过检测到两次远红外的全屋调查之间的热量发射和适当的运动，并使用红外天文卫星（IRAS）和Akari空间望远镜进行了适当的运动。这些调查的敏感性和正确运动变得太小而无法检测到的距离都给出了约8,000个AU的上限。本文涵盖了8,000 au到700 au的地区。我们已经使用了一系列的过滤和拟合算法来找到候选对，其IRA和Akari通量测量可能会合理地通过Planck热分布合理地适合可能的行星温度。理论研究对外部太阳系中可能存在的可能存在各种限制。迄今为止的主要观察性约束来自一项明智的研究：未知行星质量的上限进入了Oort云。我们的工作证实了我们的距离范围的结果，并为较低的距离和行星质量提供了其他观察限制，但要遵守该行星与银河cirrus的混淆。我们发现了535个具有合理光谱能量分布（SED）拟合的潜在候选者。大多数将质量接近或低于Neptune（约0.05木星质量），并且位于1,000 au以下。但是，对这些候选人的红外图像进行检查表明，没有一个足够令人信服的保证后续行动，因为所有这些都位于内部或靠近cirrus云，这很可能是远红外通量的来源。
We have explored a method for finding giant planets in the outer Solar System by detecting their thermal emission and proper motion between two far-infrared all-sky surveys separated by 23.4 years, taken with the InfraRed Astronomical Satellite (IRAS) and the AKARI Space Telescope. An upper distance limit of about 8,000 AU is given by both the sensitivities of these surveys and the distance at which proper motion becomes too small to be detected. This paper covers the region from 8,000 AU to 700 AU. We have used a series of filtering and SED-fitting algorithms to find candidate pairs, whose IRAS and AKARI flux measurements could together plausibly be fitted by a Planck thermal distribution for a likely planetary temperature. Theoretical studies have placed various constraints on the likely existence of unknown planets in the outer solar system. The main observational constraint to date comes from a WISE study: an upper limit on an unknown planet's mass out into the Oort cloud. Our work confirms this result for our distance range, and provides additional observational constraints for lower distances and planetary masses, subject to the proviso that the planet is not confused with Galactic cirrus. We found 535 potential candidates with reasonable spectral energy distribution (SED) fits. Most would have masses close to or below that of Neptune (~0.05 Jupiter mass), and be located below 1,000 AU. However, examination of the infrared images of these candidates suggests that none is sufficiently compelling to warrant follow-up, since all are located inside or close to cirrus clouds, which are most likely the source of the far-infrared flux.
