论文标题
WASP-148系外行星系统的牛顿模型通过苔丝和地面光度观测增强
A Newtonian model for the WASP-148 exoplanetary system enhanced with TESS and ground-based photometric observations
论文作者
论文摘要
WASP-148行星系统具有罕见的建筑，在一个紧密的轨道上具有过境的土星质量行星，并在附近的外轨道上伴随着一个较大的行星。我们使用新的空间光度法和基于地面的随访传输观测值和文献中可用的数据，我们对两个行星之间的重力相互作用进行了建模。多亏了行星B的新运输时序数据，相对于先前发表的值，轨道时期和偏心率的不确定性降低了3-4倍。运输时机的变化幅度约为20分钟，可以从地面上使用1米的望远镜进行跟进。提供了一个近似的过境世代，该ephemeris提供了重力相互作用，其精度最高为5分钟。没有发现通往海王星大小的行星的过渡签名。对于内部轨道，没有发现其他过境伴侣的大小约为2.4地球半径。但是，我们注意到，在该系统中，陆地大小的行星的制度仍然没有探索。
The WASP-148 planetary system has a rare architecture with a transiting Saturn-mass planet on a tight orbit which is accompanied by a slightly more massive planet on a nearby outer orbit. Using new space-born photometry and ground-based follow-up transit observations and data available in literature, we performed modeling that accounts for gravitational interactions between both planets. Thanks to the new transit timing data for planet b, uncertainties of orbital periods and eccentricities for both planets were reduced relative to previously published values by a factor of 3-4. Variation in transit timing has an amplitude of about 20 minutes and can be easily followed-up with a 1-m class telescopes from the ground. An approximated transit ephemeris, which accounts for gravitational interactions with an accuracy up to 5 minutes, is provided. No signature of transits was found for planet c down to the Neptune-size regime. No other transiting companions were found down to a size of about 2.4 Earth radii for interior orbits. We notice, however, that the regime of terrestrial-size planets still remains unexplored in that system.
