Transiting Exoplanet Monitoring Project (TEMP). III. On the Relocation of the Kepler-9 b Transit

Wang, Songhu and Wu, Dong-Hong and Addison, Brett C. ORCID: and Laughlin, Gregory and Liu, Hui-Gen and Wang, Yong-Hao and Yang, Taozhi and Yang, Ming and Yisikandeer, Abudusaimaitijiang and Hong, Renquan and Li, Bin and Liu, Jinzhong and Zhao, Haibin and Wu, Zhen-Yu and Hu, Shao-Ming and Zhou, Xu and Zhou, Ji-Lin and Zhang, Hui and Zheng, Jie and Wang, Wei and Fan, Zhou and Niu, Hubiao and Chen, Yuan-Yuan and Lu, Hao and Peng, Xiyan and Li, Kai and Guo, Di-Fu (2018) Transiting Exoplanet Monitoring Project (TEMP). III. On the Relocation of the Kepler-9 b Transit. The Astronomical Journal, 155 (2):73. pp. 1-7. ISSN 0004-6256


The Kepler-9 system harbors three known transiting planets. The system holds significant interest for several reasons. First, the outer two planets exhibit a period ratio that is close to a 2:1 orbital commensurability, with attendant dynamical consequences. Second, both planets lie in the planetary mass “desert” that is generally associated with the rapid gas agglomeration phase of the core accretion process. Third, there exist attractive prospects for accurately measuring both the sky-projected stellar spin-orbit angles as well as the mutual orbital inclination between the planets in the system. Following the original Kepler detection announcement in 2010, the initially reported orbital ephemerides for Kepler-9 b and c have degraded significantly, due to the limited time base-line of observations on which the discovery of the system rested. Here, we report new ground-based photometric observations and extensive dynamical modeling of the system. These efforts allow us to photometrically recover the transit of Kepler-9 b and thereby greatly improve the predictions for upcoming transit mid-times. Accurate ephemerides of this system are important in order to confidently schedule follow-up observations of this system, for both in-transit Doppler measurements as well as for atmospheric transmission spectra taken during transit.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 28 Jan 2021 23:26
Last Modified: 31 Jan 2021 23:32
Uncontrolled Keywords: methods: observational; planetary systems; planets and satellites; fundamental parameters; planets and satellites: individual: Kepler-9b; stars: individual: Kepler-9; techniques: photometric; Astrophysics; Earth and Planetary Astrophysics
Fields of Research (2008): 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020110 Stellar Astronomy and Planetary Systems
Fields of Research (2020): 51 PHYSICAL SCIENCES > 5101 Astronomical sciences > 510109 Stellar astronomy and planetary systems
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Socio-Economic Objectives (2020): 28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280120 Expanding knowledge in the physical sciences
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