论文标题

苔丝观察到的68个径向速度系外行星的无效传输检测

Null transit detections of 68 radial velocity exoplanets observed by TESS

论文作者

Lovos, F. V., Díaz, R. F., Nieto, L. A.

论文摘要

近年来,系外行星的数量已大大增加。这些检测中最成功的技术是径向速度(RV)和行星过渡技术,后者由Kepler,K2以及最近的TESS任务显着提出。通过过境和RVS检测系外行星非常重要,因为这将允许表征其散装密度和内部组成。过渡系外行星调查卫星(TESS)调查提供了独特的可能性,可以寻找RV检测到的外星行星的过渡。在这项工作中,我们介绍了使用苔丝空间任务的光度法检测到用径向速度技术检测到的行星过渡的结果。我们专注于在轨道上具有超过30天的轨道上的超伊斯兰行星和海王星行星的系统。该切割旨在使对象保持相对较高的过境概率,并且与单个扇区上的苔丝观察持续时间保持一致。鉴于总的几何过境概率,过境行星的预期数量为$ 3.4 \ pm 1.8 $。该样品包含两个已知的过渡行星。我们报告了所研究的68个行星中其余66个,在所有情况下,我们排除了大于2.4 r $ _ {\ oplus} $的行星。其余两个行星轨道轨道高清〜136352,最近宣布了。

In recent years the number of exoplanets has grown considerably. The most successful techniques in these detections are the radial velocity (RV) and planetary transits techniques, the latter significantly advanced by the Kepler, K2 and, more recently, the TESS missions. The detection of exoplanets both by means of transit and by RVs is of importance, because this would allows characterizing their bulk densities, and internal compositions. The Transiting Exoplanet Survey Satellite (TESS) survey offers a unique possibility to search for transits of extrasolar planets detected by RV. In this work, we present the results of the search for transits of planets detected with the radial velocity technique, using the photometry of the TESS space mission. We focus on systems with super-Earths and Neptunes planets on orbits with periods shorter than 30 days. This cut is intended to keep objects with a relatively high transit probability, and is also consistent with duration of TESS observations on a single sector. Given the summed geometric transit probabilities, the expected number of transiting planets is $3.4 \pm 1.8$. The sample contains two known transiting planets. We report null results for the remaining 66 out of 68 planets studied, and we exclude in all cases planets larger than 2.4 R$_{\oplus}$, under the assumption of central transits. The remaining two planets orbit HD~136352 and have been recently been announced.

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