4 papers
A Massive Hot-Jupiter Companion that Disfavors Giant Planet Formation Beyond the Water-Ice Line
Eritas Yang, Tiger Lu, Daniel A. Yahalomi +1
We report evidence for a brown-dwarf companion with mass in the KELT-20 system, in which an ultra-hot Jupiter transits an A2-type star. The companion's p…
Discovery of a dwarf planet candidate in an extremely wide orbit: 2017 OF201
Sihao Cheng, Jiaxuan Li, Eritas Yang
We report the discovery of a dwarf planet candidate, 2017 OF201, currently located at a distance of 90 au. Its orbit is extremely wide and extends to the inner Oort cloud, with a s…
An Analytical Model for the Eccentricity Cascade: Hot Jupiter Formation via S-type Instability
Eritas Yang, Yubo Su
A widely explored pathway for hot Jupiter (HJ) formation is high-eccentricity migration driven by von Zeipel-Lidov-Kozai cycles induced by an exterior companion. However, for a dis…
A third star in the HAT-P-7 system, and a new dynamical pathway to misaligned hot Jupiters
Eritas Yang, Yubo Su, Joshua N. Winn
The retrograde orbit of the hot Jupiter HAT-P-7b is suggestive of high-eccentricity migration caused by dynamical interactions with a massive companion. However, the only other kno…