115 citations · 934 across the 23 of their papers we have counts for
15 papers · 1 filter
Modeling the Dynamics and Thermochemistry for the Outer Atmospheres of the Ultra-hot Jupiter WASP-121b
Lile Wang, Yiren Lin, Ji Wang +1
We present three-dimensional simulations of the ultra-hot Jupiter (UHJ) WASP-121b from the planetary surface to extended outflows, coupling hydrodynamics with consistent non-equili…
Observational Signatures of Disk Winds in Protoplanetary Disks: Differentiating Magnetized and Photoevaporative Outflows With Fully Coupled Thermochemistry
Xiao Hu, Jaehan Bae, Zhaohuan Zhu +1
Magnetized winds and photoevaporative winds are critical in shaping protoplanetary disk evolution. Using 2D axisymmetric (magneto-)hydrodynamic simulations with Athena++ implementi…
Gap Opening in Protoplanetary Disks: Gas Dynamics from Global Non-ideal MHD Simulations with Consistent Thermochemistry
Xiao Hu, Zhi-Yun Li, Lile Wang +2
Recent high angular resolution ALMA observations have revealed numerous gaps in protoplanetary disks. A popular interpretation has been that planets open them. Most previous invest…
Detection of Atmospheric Escape from Four Young Mini Neptunes
Michael Zhang, Heather A. Knutson, Fei Dai +5
We use Keck/NIRSPEC to survey a sample of of young (1 Gyr), short period mini Neptunes orbiting nearby K dwargs to measure their mass loss via the metastable helium line. We det…
The Maximum Mass-Loss Efficiency for a Photoionization-Driven Isothermal Parker Wind
Shreyas Vissapragada, Heather A. Knutson, Leonardo A. dos Santos +2
Observations of present-day mass-loss rates for close-in transiting exoplanets provide a crucial check on models of planetary evolution. One common approach is to model the planeta…
Escaping Helium from TOI 560.01, a Young Mini Neptune
Michael Zhang, Heather A. Knutson, Lile Wang +2
We report helium absorption from the escaping atmosphere of TOI 560.01 (HD 73583b), a , d mini Neptune orbiting a young (600 Myr) K dwarf. Using Keck/…
Detection of Ongoing Mass Loss from HD 63433c, a Young Mini Neptune
Michael Zhang, Heather A. Knutson, Lile Wang +9
We detect Lyman absorption from the escaping atmosphere of HD 63433c, a , d mini Neptune orbiting a young (440 Myr) solar analogue in the Ursa Major M…
Metastable Helium Absorptions with 3D Hydrodynamics and Self-Consistent Photochemistry II: WASP-107b, Stellar Wind, Radiation Pressure, and Shear Instability
Lile Wang, Fei Dai
This paper presents simulations of the metastable helium (He*) observations of WASP-107b, so far the highest signal-to-noise ratio detection that is confirmed by three different in…
Metastable Helium Absorptions with 3D Hydrodynamics and Self-Consistent Photochemistry I: WASP-69b, Dimensionality, XUV Flux Level, Spectral Types, and Flares
Lile Wang, Fei Dai
The metastable Helium (He*) lines near are ideal probes of atmospheric erosion--a common phenomenon of close-in exoplanet evolution. A handful of exoplanet observat…
No escaping helium from 55 Cnc e
Michael Zhang, Heather A. Knutson, Lile Wang +3
We search for escaping helium from the hot super Earth 55 Cnc e by taking high-resolution spectra of the 1083 nm line during two transits using Keck/NIRSPEC. We detect no helium ab…
Dusty outflows in planetary atmospheres: Understanding "super-puffs" and transmission spectra of sub-Neptunes
Lile Wang, Fei Dai
`Super-puffs' are planets with anomalously low mean densities (). With a low surface gravity, the extended atmosphere is susceptible to extreme h…
Global Simulations of Protoplanetary Disk Outflows with Coupled Non-ideal Magnetohydrodynamics and Consistent Thermochemistry
Lile Wang, Xue-Ning Bai, Jeremy Goodman
Magnetized winds may be important in dispersing protoplanetary disks and influencing planet formation. We carry out global full magnetohydrodynamic simulations in axisymmetry, coup…
Evaporation of Low-Mass Planet Atmospheres: Multidimensional Hydrodynamics with Consistent Thermochemistry
Lile Wang, Fei Dai
Direct and statistical observational evidences suggest that photoevaporation is important in eroding the atmosphere of sub-Neptune planets. We construct full hydrodynamic simulatio…
Hydrodynamic Photoevaporation of Protoplanetary Disks with Consistent Thermochemistry
Lile Wang, Jeremy J. Goodman
Photoevaporation is an important dispersal mechanism for protoplanetary disks. We conduct hydrodynamic simulations coupled with ray-tracing radiative transfer and consistent thermo…
Wind-driven Accretion in Transitional Protostellar Disks
Lile Wang, Jeremy J. Goodman
Transitional protostellar disks have inner cavities heavily depleted in dust and gas, yet most show signs of ongoing accretion, often at rates comparable to full disks. We show tha…