5 papers
Formation of black hole stars via star--black hole collisions
Yanlong Shi, Qingru Hu, Zhenghao Xu +2
In dense stellar environments such as globular clusters and active galactic nucleus (AGN) disks, stellar-mass black holes (sBHs) may frequently collide with massive stars. We inves…
Dynamical formation of high-eccentricity compact binaries through BH--BH*/TZO collisions
Qingru Hu, Yanlong Shi, Douglas N. C. Lin +1
The rapidly accumulating discoveries of binary stellar-mass black-hole (sBH) coalescences, detected by LIGO, have opened a new window into the formation and evolution of compact bi…
Are Hot Jupiters Tidally Disrupted During Stellar Main Sequence?
Qingru Hu, Wei Zhu, Yang Huang +1
Once hot Jupiters (HJs) reach their very close orbits, they are expected to experience orbital decay due to tidal interactions with their host star. However, the strength of tidal…
Are Near Resonant Multiple-planet Systems from Kepler Young?
Wei Zhu, Qingru Hu
Recent studies have claimed that Kepler multi-planet systems hosting near-resonant planet pairs---particularly those near second-order mean-motion resonances (MMRs)---exhibit small…
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…