DREAM-I. Orbital architecture orrery

V Bourrier, O Attia, M Mallonn, A Marret… - Astronomy & …, 2023‏ - aanda.org
The distribution of close-in exoplanets is shaped by a complex interplay between
atmospheric and dynamical processes. The Desert-Rim Exoplanets Atmosphere and …

Long-term Evolution of Tightly Packed Stellar Black Holes in AGN Disks: Formation of Merging Black Hole Binaries via Close Encounters

J Li, D Lai, L Rodet - The Astrophysical Journal, 2022‏ - iopscience.iop.org
We study the long-term evolution of two or more stellar black holes (BHs) on initially
separated but unstable circular orbits around a supermassive BH (SMBH). Such a close …

Giants are bullies: how their growth influences systems of inner sub-Neptunes and super-Earths

B Bitsch, A Izidoro - Astronomy & Astrophysics, 2023‏ - aanda.org
Observational evidence points to an unexpected correlation between outer giant planets
and inner sub-Neptunes, which has remained unexplained by simulations so far. We utilize …

Prospects from TESS and Gaia to constrain the flatness of planetary systems

JI Espinoza-Retamal, W Zhu… - The Astronomical …, 2023‏ - iopscience.iop.org
The mutual inclination between planets orbiting the same star provides key information to
understand the formation and evolution of multiplanet systems. In this work, we investigate …

Small and Close-in Planets are Uncommon Around A-type Stars

S Giacalone, CD Dressing - The Astronomical Journal, 2024‏ - iopscience.iop.org
The Kepler and K2 missions enabled robust calculations of planet occurrence rates around
FGKM-type stars. However, these missions observed too few stars with earlier spectral types …

The Metallicity Dimension of the Super Earth-cold Jupiter Correlation

W Zhu - Research in Astronomy and Astrophysics, 2024‏ - iopscience.iop.org
The correlation between close-in super Earths and distant cold Jupiters in planetary systems
has important implications for their formation and evolution. Contrary to some earlier …

The HD 137496 system: A dense, hot super-Mercury and a cold Jupiter

TA Silva, ODS Demangeon, SCC Barros… - Astronomy & …, 2022‏ - aanda.org
Context. Most of the currently known planets are small worlds with radii between that of the
Earth and that of Neptune. The characterization of planets in this regime shows a large …

Planet-driven scatterings of planetesimals into a star: probability, time-scale, and applications

L Rodet, D Lai - Monthly Notices of the Royal Astronomical …, 2024‏ - academic.oup.com
ABSTRACT A planetary system can undergo multiple episodes of intense dynamical
activities throughout its life, resulting in the production of star-grazing planetesimals (or …

Free-floating Planets, Survivor Planets, Captured Planets, and Binary Planets from Stellar Flybys

F Yu, D Lai - The Astrophysical Journal, 2024‏ - iopscience.iop.org
In star clusters, close stellar encounters can strongly impact the architecture of a planetary
system or even destroy it. We present a systematic study of the effects of stellar flybys on two …

Short-period Small Planets with High Mutual Inclinations are More Common around Metal-rich Stars

X Hua, SX Wang, D An, S Wang, Y Huang… - The Astrophysical …, 2025‏ - iopscience.iop.org
We present a correlation between the stellar metallicities and the mutual inclinations of
multiplanet systems hosting short-period small planets (a/R⋆< 12, R p< 4 R⊕). We analyzed …