论文标题
苔丝发现了一个热木星，内部过渡海王星
TESS spots a hot Jupiter with an inner transiting Neptune
论文作者
论文摘要
热木星很少在轨道距离内的其他行星上伴随着其他行星。以前，仅发现了两个这样的系统。在这里，我们使用过渡系外行星调查卫星（TESS）的数据报告了第三个系统的发现。宿主星（TOI-1130）是Gaia G频段中的11级K-warf。它有两个过境行星：一个Neptune大小的行星（$ 3.65 \ pm 0.10 $ $ $ r_e $），带有4.1天的时间，还有一个热木星（$ 1.50^{+0.27} _ { - 0.22} $ $ $ $ $ $ $ r_j $），周期为8.4天。精确的径向速度观察表明，热木星的质量为$ 0.974^{+0.043} _ { - 0.044} $ $ $ M_J $。对于内部海王星，数据仅提供0.17 $ m_j $（3 $σ$）的质量上限。然而，我们有信心内部行星是真实的，基于后续的地面光度法和自适应光学成像，这些光度法排除了苔丝过境信号的其他合理来源。宿主星的异常行星结构和亮度使TOI-1130成为行星形成理论的好测试用例，也是对未来光谱观测的有吸引力的目标。
Hot Jupiters are rarely accompanied by other planets within a factor of a few in orbital distance. Previously, only two such systems have been found. Here, we report the discovery of a third system using data from the Transiting Exoplanet Survey Satellite (TESS). The host star, TOI-1130, is an 11th magnitude K-dwarf in the Gaia G band. It has two transiting planets: a Neptune-sized planet ($3.65\pm 0.10$ $R_E$) with a 4.1-day period, and a hot Jupiter ($1.50^{+0.27}_{-0.22}$ $R_J$) with an 8.4-day period. Precise radial-velocity observations show that the mass of the hot Jupiter is $0.974^{+0.043}_{-0.044}$ $M_J$. For the inner Neptune, the data provide only an upper limit on the mass of 0.17 $M_J$ (3$σ$). Nevertheless, we are confident the inner planet is real, based on follow-up ground-based photometry and adaptive optics imaging that rule out other plausible sources of the TESS transit signal. The unusual planetary architecture of and the brightness of the host star make TOI-1130 a good test case for planet formation theories, and an attractive target for future spectroscopic observations.
