Jingyao Dou
A5093042256- Astro and Planetary Science
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Planetary Science and Exploration
- Astronomical Observations and Instrumentation
- Astrophysics and Star Formation Studies
- Space Exploration and Technology
- Fluid Dynamics Simulations and Interactions
- Calibration and Measurement Techniques
- Space Science and Extraterrestrial Life
University of Bristol
2023-2024
Context. One of the goals Echelle Spectrograph for Rocky Exoplanets and Stable Spectroscopic Observations (ESPRESSO) Guaranteed Time (GTO) consortium is precise characterisation a selected sample planetary systems discovered by TESS. such target K0V star HIP 29442 (TOI-469), already known to host validated sub-Neptune companion TOI-469.01, which we followed-up with ESPRESSO. Aims. We aim verify nature TOI-469.01 obtaining mass, radius, ephemeris, constraining its bulk physical structure...
ABSTRACT During the final stage of planetary formation, different formation pathways embryos could significantly influence observed variations in densities. Of approximately 5000 exoplanets identified to date, a notable subset exhibits core fractions reminiscent Mercury, potentially consequence high-velocity giant impacts. In order better understand such collisions on and compositional evolution, we conducted an extensive set smoothed particle hydrodynamics impact simulations between...
ABSTRACT Head-on giant impacts (collisions between planet-sized bodies) are frequently used to study the planet formation process as they present an extreme configuration where two colliding bodies greatly disturbed. With limited computing resources, focusing on these eases burden of exploring a large parameter space. Results from head-on often then extended oblique with angle corrections or initial conditions for other calculations, example, evolution ejected debris. In this study, we...
During the final stage of planetary formation, different formation pathways embryos could significantly influence observed variations in densities. Of approximately 5,000 exoplanets identified to date, a notable subset exhibit core fractions reminiscent Mercury, potentially consequence high-velocity giant impacts. In order better understand such collisions on and compositional evolution, we conducted an extensive set smoothed particle hydrodynamics impact simulations between two-layered...
We followed-up with ESPRESSO the K0V star HIP 29442 (TOI-469), already known to host a validated sub-Neptune companion TOI-469.01. aim verify planetary nature of modelled radial velocity and photometric time series measure dynamical mass, radius, ephemeris, characterise internal structure composition confirmed Thanks we discovered two additional close-in companions. also detected their low signal-to-noise transit signals in TESS light curve. is compact multi-planet system, three planets have...
Planets grow in rotating disks of dust and gas around forming stars, some which can subsequently collide giant impacts after the component is removed from disk. Monitoring programs with warm Spitzer mission have recorded significant rapid changes mid-infrared output for several interpreted as variations surface area dusty material ejected by planetary-scale collisions heated central star: e.g., NGC 2354-ID8, HD 166191 V844 Persei. Here we report combined observations young (about 300 Myr),...