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Polygram Stars: Resonant Tidal Excitation of Fundamental Oscillation Modes in Asynchronous Stellar Coalescence
Morgan MacLeod, Michelle Vick, Dong Lai +1
The prevalence of binary stars at close separations implies that many of these systems will interact or merge during the binary's lifetime. This paper presents hydrodynamic simulat…
Chaotic Tides in Migrating Gas Giants: Forming Hot and Transient Warm Jupiters via High-Eccentricity Migration
Michelle Vick, Dong Lai, Kassandra R. Anderson
High-eccentricity migration is an important channel for the formation of hot Jupiters (HJs). In particular, Lidov-Kozai (LK) oscillations of orbital eccentricity/inclination induce…
Hydrodynamics of circumbinary accretion: Angular momentum transfer and binary orbital evolution
Diego J. Muñoz, Ryan Miranda, Dong Lai
We carry out 2D viscous hydrodynamical simulations of circumbinary accretion using the AREPO code. We self-consistently compute the accretion flow over a wide range of spatial scal…
Enhanced Black-Hole Mergers in Binary-Binary Interactions
Bin Liu, Dong Lai
We study the orbital evolution of black hole (BH) binaries in quadruple systems, where the tertiary binary excites large eccentricity in the BH binary through Lidov-Kozai (LK) osci…
Teetering Stars: Resonant Excitation of Stellar Obliquities by Hot and Warm Jupiters with External Companions
Kassandra R. Anderson, Dong Lai
Stellar spin-orbit misalignments (obliquities) in hot Jupiter systems have been extensively probed. Such obliquities may reveal clues about hot Jupiter dynamical histories. Common…
Photoevaporation and High-Eccentricity Migration Created the Sub-Jovian Desert
James E. Owen, Dong Lai
The mass-period or radius-period distribution of close-in exoplanets shows a paucity of intermediate mass/size (sub-Jovian) planets with periods ~< 3 days. We show that this sub-Jo…