Radial velocity measurements of the brown dwarf CD-35 2722 B reveal a strong 169-day periodic signal attributed to a ~0.74 Jupiter-mass satellite, with a weaker secondary signal possibly indicating a second satellite near 2:1 resonance.
Truly eccentric. I. Revisiting eight single-eccentric planetary systems
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abstract
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 analog, with a period of 14.7 yr, $e=0.18$, and m sin $i$ of 2M_Jup, whilst 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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Planetary-Mass Exosatellite Detected Around the Substellar Companion of a Star
Radial velocity measurements of the brown dwarf CD-35 2722 B reveal a strong 169-day periodic signal attributed to a ~0.74 Jupiter-mass satellite, with a weaker secondary signal possibly indicating a second satellite near 2:1 resonance.