期刊
ASTROPHYSICAL JOURNAL
卷 780, 期 2, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/780/2/140
关键词
methods: numerical; planets and satellites: dynamical evolution and stability; planets and satellites: individual (HD 73526); techniques: radial velocities
资金
- Hong Kong RGC [HKU 7024/13P]
- BASAL CATA Center for Astrophysics and Associated Technologies [PFB-06]
- Milky Way Millennium Nucleus from the Ministry for the Economy, Development, and Tourism's Programa Iniciativa Cientifica Milenio [P07-021-F]
- Australian Research Council [DP0774000, DP130102695]
- STFC [ST/G002622/1, ST/F007280/1, ST/L001403/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/F007280/1, ST/G002622/1, ST/L001403/1] Funding Source: researchfish
We present six years of new radial velocity data from the Anglo-Australian and Magellan Telescopes on the HD 73526 2:1 resonant planetary system. We investigate both Keplerian and dynamical ( interacting) fits to these data, yielding four possible configurations for the system. The new data now show that both resonance angles are librating, with amplitudes of 40 degrees and 60 degrees, respectively. We then perform long-term dynamical stability tests to differentiate these solutions, which only differ significantly in the masses of the planets. We show that while there is no clearly preferred system inclination, the dynamical fit with i = 90 degrees provides the best combination of goodness-of-fit and long-term dynamical stability.
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