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首页> 外文期刊>Astronomy and astrophysics >Transiting exoplanets from the CoRoT space mission - XXVI. CoRoT-24: a transiting multiplanet system
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Transiting exoplanets from the CoRoT space mission - XXVI. CoRoT-24: a transiting multiplanet system

机译：来自CoRoT太空任务-XXVI的转运系外行星。 CoRoT-24：正在运行的多行星系统

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We present the discovery of a candidate multiply transiting system, the first one found in the CoRoT mission. Two transit-like features with periods of 5.11 and 11.76 d are detected in the CoRoT light curve around a main sequence K1V star of r = 15.1. If the features are due to transiting planets around the same star, these would correspond to objects of 3.7 ± 0.4 and 5.0 ± 0.5 R⊕ , respectively. Several radial velocities serve to provide an upper limit of 5.7 M⊕ for the 5.11 d signal and to tentatively measure a mass of 28+11-11 M⊕ for the object transiting with a 11.76 d period. These measurements imply low density objects, with a significant gaseous envelope. The detailed analysis of the photometric and spectroscopic data serves to estimate the probability that the observations are caused by transiting Neptune-sized planets as much as over 26 times higher than a blend scenario involving only one transiting planet and as much as over 900 times higher than a scenario involving two blends and no planets. The radial velocities show a long-term modulation that might be attributed to a 1.5 MJup planet orbiting at 1.8 AU from the host, but more data are required to determine the precise orbital parameters of this companion.
机译：我们介绍了一个候选乘运系统的发现，这是在CoRoT任务中发现的第一个系统。在CoRoT光曲线中，在r = 15.1的主序列K1V星周围检测到两个周期为5.11和11.76 d的类似过渡特征。如果这些特征是由于围绕同一颗恒星运行的行星造成的，那么这些特征将分别对应于3.7±0.4和5.0±0.5R⊕的物体。几个径向速度可为5.11 d信号提供5.7M⊕的上限，并为在11.76 d周期内经过的物体暂定测量质量为28 + 11-11M⊕。这些测量结果表明具有低密度气体包裹的低密度物体。对光度和光谱数据的详细分析可用来估计观测结果是由海王星大小的行星引起的，其概率比仅涉及一个行星的混合场景高出26倍以上，而比海王星大小的行星高出900倍以上。一个包含两个混合星且没有行星的场景。径向速度显示出长期的调制，这可能归因于一颗1.5 MJup行星从主行星以1.8 AU绕行，但是需要更多数据才能确定该伴星的精确轨道参数。

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