Truly eccentric - I. Revisiting eight single-eccentric planetary systems

Wittenmyer, Robert A. and Clark, Jake T. and Zhao, Jinglin and Horner, Jonathan and Wang, Songhu and Johns, Daniel (2019) Truly eccentric - I. Revisiting eight single-eccentric planetary systems. Monthly Notices of the Royal Astronomical Society, 484 (4). pp. 5859-5867. ISSN 0035-8711

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We examine eight known single-eccentric planetary systems in light of recently released large data archives and new analysis techniques. For four of these systems (HD 7449, HD 65216, HD 89744, HD 92788) we find evidence for additional long-period companions. HD 65216c is a Jupiter analogue, with a period of 14.7 yr, e = 0.18, and m sin i of 2M<SUB>Jup</SUB>, while the remaining candidate companions move on as- yet-incomplete orbits. Our results highlight the importance of revisiting the analysis of known exoplanetary systems when new data become available, particularly given the possibility that poorly sampled data might previously have led to the detection of a `false-positive' single-eccentric planet, when the system in question actually contains two (or more) planets on near-circular orbits.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item made available in accordance with the copyright policy of the publisher.
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Agricultural, Computational and Environmental Sciences
Date Deposited: 11 Jun 2019 03:28
Last Modified: 20 Jun 2019 05:42
Uncontrolled Keywords: radial velocities; planets and satellites; stars; HD 7449; HD 65216; HD 89744; HD 92788; astrophysics; Earth; planetary astrophysics
Fields of Research : 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020110 Stellar Astronomy and Planetary Systems
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Identification Number or DOI: 10.1093/mnras/stz290

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