11 papers
TESS planets in known radial velocity cold Jupiter systems: Hot super Earth occurrence is enhanced by cold Jupiters
Quanyi Liu, Wei Zhu, Tianjun Gan +1
The correlation between inner super-Earths (SEs) and outer cold Jupiters (CJs) provides an important constraint on the formation and dynamical evolution of planetary systems. Previ…
The Intrinsic Multiplicity Distribution of Exoplanets Revealed from the Radial Velocity Method. II. Constraints on Giant Planet Multiplicity from Different Surveys
Jiayin Li, Wei Zhu
Compared to the commonly used planet occurrence rates, the multiplicity distribution of planets can be more useful in constraining the formation and evolution pathways of planetary…
Two Low Mass-Ratio Microlensing Planets and Two Types of Central-Resonant Degeneracy
Yuchen Tang, Weicheng Zang, Yoon-Hyun Ryu +39
We present observations and analysis of two low planet/host mass-ratio () microlensing planets discovered in high-magnification events. KMT-2025-BLG-0811Lb has $q \sim 4.5 \time…
Exciting Stellar Eccentricity in Gaia BH3 via a Hidden Black Hole Binary
Qingru Hu, Bin Liu, Wei Zhu
We propose that the high eccentricity of the stellar orbit in Gaia BH3 system could be excited through a secular resonance effect if the inner dark object is, in effect, a tight an…
Unexpected Near-Resonant and Metastable States of Young Multi-Planet Systems
Zhecheng Hu, Fei Dai, Wei Zhu +4
Recent observations suggest that the incidence of near-resonant planets declines as planetary systems age, making young planetary systems key signposts of early dynamical evolution…
Early Stellar Flybys are Unlikely: Improved Constraints from Sednoids and Large- TNOs
Qingru Hu, Yukun Huang, Brett Gladman +1
Sedna-like objects (a.k.a. sednoids) are transneptunian objects (TNOs) characterized by large semimajor axes and exceptionally high perihelia. Their high- orbits are detached fr…