AU显微镜B和C的过时定时变化

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AU显微镜B和C的过时定时变化

Transit timing variations of AU Microscopii b and c

论文作者

Szabó, Gy. M., Garai, Z., Brandeker, A., Gandolfi, D., Wilson, T. G., Deline, A., Olofsson, G., Fortier, A., Queloz, D., Borsato, L., Kiefer, F., Etangs, A. Lecavelier des, Lendl, M., Serrano, L. M., Sulis, S., Moll, S. Ulmer, Van Grootel, V., Alibert, Y., Alonso, R., Anglada, G., Bárczy, T., Navascues, D. Barrado y, Barros, S. C. C., Baumjohann, W., Beck, M., Beck, T., Benz, W., Billot, N., Bonfanti, A., Bonfils, X., Broeg, C., Cabrera, J., Charnoz, S., Cameron, A. Collier, Csizmadia, Sz., Davies, M. B., Deleuil, M., Delrez, L., Demangeon, O., Demory, B. -O., Ehrenreich, D., Erikson, A., Fossati, L., Fridlund, M., Gillon, M., Güdel, M., Heng, K., Hoyer, S., Isaak, K. G., Kiss, L. L., Laskar, J., Lovis, C., Magrin, D., Maxted, P. F. L., Mecina, M., Nascimbeni, V., Ottensamer, R., Pagano, I., Pallé, E., Peter, G., Piotto, G., Pollacco, D., Ragazzoni, R., Rando, N., Rauer, H., Ribas, I., Santos, N. C., Sarajlic, M., Scandariato, G., Ségransan, D., Simon, A. E., Smith, A. M. S., Sousa, S., Steller, M., Thomas, N., Udry, S., Verrecchia, F., Walton, N., Wolter, D.

论文摘要

在这里，我们报告了Au \，Microcopii B和C的大振幅传输时机变化（TTV），如在Tess（2018，2020，2020）中检测到的，和Cheops（2020，2021）的传输观测值。 Au Mic是一个年轻的行星系统，具有碎屑盘和两个过境温暖的海王星。先前在Au Mic B上报道了几分钟的TTV，这被认为是系统中行星之间相互扰动的结果。在2021年，我们与Cheops空间望远镜一起观察到了Au Mic B（五个转运）和C（三个转运），以跟进Au Mic B的TTV，并可能检测到Au Mic c的TTV。当一起分析Tess和Cheops 2020--2021的测量时，我们发现在两个TTV极值之间出现了一个突出的TTV，整个跨度约为23分钟。假设周期变化是由周期性过程（例如相互扰动）导致的，我们证明了2022年夏季的过渡时间预计将比可用的线性敏捷预测的时间晚30--85分钟。

Here we report large-amplitude transit timing variations (TTVs) for AU\,Microcopii b and c as detected in combined TESS (2018, 2020) and CHEOPS (2020, 2021) transit observations. AU Mic is a young planetary system with a debris disk and two transiting warm Neptunes. A TTV on the order of several minutes was previously reported for AU Mic b, which was suggested to be an outcome of mutual perturbations between the planets in the system. In 2021, we observed AU Mic b (five transits) and c (three transits) with the CHEOPS space telescope to follow-up the TTV of AU Mic b and possibly detect a TTV for AU Mic c. When analyzing TESS and CHEOPS 2020--2021 measurements together, we find that a prominent TTV emerges with a full span of ~23 minutes between the two TTV extrema. Assuming that the period change results from a periodic process - such as mutual perturbations - we demonstrate that the times of transits in the summer of 2022 are expected to be 30--85 minutes later than predicted by the available linear ephemeris.

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