73 citations · 690 across the 19 of their papers we have counts for
19 papers
GMC Collisions As Triggers of Star Formation. VIII. The Core Mass Function
Chia-Jung Hsu, Jonathan C. Tan, Duncan Christie +2
Compression in giant molecular cloud (GMC) collisions is a promising mechanism to trigger formation of massive star clusters and OB associations. We simulate colliding and non-coll…
A JWST NIRSpec Phase Curve for WASP-121b: Dayside Emission Strongest Eastward of the Substellar Point and Nightside Conditions Conducive to Cloud Formation
Thomas Mikal-Evans, David K. Sing, Jiayin Dong +10
We present the first exoplanet phase curve measurement made with the JWST NIRSpec instrument, highlighting the exceptional stability of this newly-commissioned observatory for exop…
Observability of signatures of transport-induced chemistry in clear atmospheres of hot gas giant exoplanets
Maria Zamyatina, Éric Hébrard, Benjamin Drummond +6
Transport-induced quenching, i.e., the homogenisation of chemical abundances by atmospheric advection, is thought to occur in the atmospheres of hot gas giant exoplanets. While som…
CAMEMBERT: A Mini-Neptunes GCM Intercomparison, Protocol Version 1.0. A CUISINES Model Intercomparison Project
Duncan A. Christie, Elspeth K. H. Lee, Hamish Innes +19
With an increased focus on the observing and modelling of mini-Neptunes, there comes a need to better understand the tools we use to model their atmospheres. In this paper, we pres…
The Impact of Phase Equilibrium Cloud Models on GCM Simulations of GJ~1214b
D. A. Christie, N. J. Mayne, R. M. Gillard +4
We investigate the impact of clouds on the atmosphere of GJ~1214b using the radiatively-coupled, phase-equilibrium cloud model {\sc EddySed} coupled to the {\sc Unified Model} gene…
3D radiative-transfer for exoplanet atmospheres. gCMCRT: a GPU accelerated MCRT code
Elspeth K. H. Lee, Joost P. Wardenier, Bibiana Prinoth +10
Radiative-transfer (RT) is a key component for investigating atmospheres of planetary bodies. With the 3D nature of exoplanet atmospheres being important in giving rise to their ob…
The Impact of Mixing Treatments on Cloud Modelling in 3D Simulations of Hot Jupiters
D. A. Christie, N. J. Mayne, S. Lines +7
We present results of 3D hydrodynamical simulations of HD209458b including a coupled, radiatively-active cloud model ({\sc EddySed}). We investigate the role of the mixing by repla…
GMC Collisions as Triggers of Star Formation. VII. The Effect of Magnetic Field Strength on Star Formation
Benjamin Wu, Jonathan C. Tan, Duncan Christie +1
We investigate the formation of stars within giant molecular clouds (GMCs) evolving in environments of different global magnetic field strength and large-scale dynamics. Building u…
A Model of the H and Na Transmission Spectrum of HD 189733b
Chenliang Huang, Phil Arras, Duncan Christie +1
This paper presents a detailed hydrostatic model of the upper atmosphere of HD 189733b, with the goal of constraining its temperature, particle densities, and radiation field over…
GMC Collisions as Triggers of Star Formation. VI. Collision-Induced Turbulence
Benjamin Wu, Jonathan C. Tan, Fumitaka Nakamura +2
We investigate collisions between giant molecular clouds (GMCs) as potential generators of their internal turbulence. Using magnetohydrodynamic (MHD) simulations of self-gravitatin…
GMC Collisions As Triggers of Star Formation. IV. The Role of Ambipolar Diffusion
Duncan Christie, Benjamin Wu, Jonathan C. Tan
We investigate the role of ambipolar diffusion (AD) in collisions between magnetized giant molecular clouds (GMCs), which may be an important mechanism for triggering star cluster…
The Interstellar Medium and Star Formation of Galactic Disks. I. ISM and GMC properties with Diffuse FUV and Cosmic Ray Backgrounds
Qi Li, Jonathan C. Tan, Duncan Christie +2
We present a series of adaptive mesh refinement (AMR) hydrodynamic simulations of flat rotation curve galactic gas disks with a detailed treatment of the interstellar medium (ISM)…
GMC Collisions as Triggers of Star Formation. III. Density and Magnetically Regulated Star Formation
Benjamin Wu, Jonathan C. Tan, Duncan Christie +3
We study giant molecular cloud (GMC) collisions and their ability to trigger star cluster formation. We further develop our three dimensional magnetized, turbulent, colliding GMC s…
GMC Collisions as Triggers of Star Formation. II. 3D Turbulent, Magnetized Simulations
Benjamin Wu, Jonathan C. Tan, Fumitaka Nakamura +3
We investigate giant molecular cloud (GMCs) collisions and their ability to induce gravitational instability and thus star formation. This mechanism may be a major driver of star f…
Investigation of the environment around close-in transiting exoplanets using CLOUDY
Jake D. Turner, Duncan Christie, Phil Arras +2
It has been suggested that hot stellar wind gas in a bow shock around an exoplanet is sufficiently opaque to absorb stellar photons and give rise to an observable transit depth at…
Axisymmetric Simulations of Hot Jupiter-Stellar Wind Hydrodynamic Interaction
Duncan Christie, Phil Arras, Zhi-Yun Li
Gas giant exoplanets orbiting at close distances to the parent star are subjected to large radiation and stellar wind fluxes. In this paper, hydrodynamic simulations of the planeta…
Hα Absorption in Transiting Exoplanet Atmospheres
Duncan Christie, Phil Arras, Zhi-Yun Li
Absorption of stellar Hα by the upper atmosphere of the planet HD189733b has recently been detected by Jensen et al. Motivated by this observation, we have developed a model for at…
Do Lognormal Column-Density Distributions in Molecular Clouds Imply Supersonic Turbulence?
K. Tassis, D. A. Christie, A. Urban +4
Recent observations of column densities in molecular clouds find lognormal distributions with power-law high-density tails. These results are often interpreted as indications that…
Formation of Interstellar Clouds: Parker Instability with Phase Transitions
Telemachos Ch. Mouschovias, Matthew W. Kunz, Duncan A. Christie
We follow numerically the nonlinear evolution of the Parker instability in the presence of phase transitions from a warm to a cold HI interstellar medium in two spatial dimensions.…