ejecta plume Archives

Giant impacts are highly complex events with different processes dominating the dynamics of different regions of the colliding bodies. Illustrative time snapshots from an example SPH giant impact simulation with a resolution on the order 106 particles. All particles in the lower hemispheres only of the colliding bodies are shown and coloured by material type as follows: target core (grey), mantle (orange), and atmosphere (blue); impactor core (brown) and mantle (yellow). Colour luminosity is scaled by the particles’ internal energy. Impact parameters (defined in Section 2.2) and atmospheric loss fraction (Xatm) are detailed in the first panel, with lost particles (those that ultimately become unbound to the largest remnant) coloured in green. The simulation time corresponding to each snapshot is given in each panel, with t = 0.0 hr defined as the point of impact. White dashed lines in the second and third panels indicate the approximate location of the front of the impact shock wave. An animation of this figure is available in the Supplementary Material. -- astro-ph.EP

Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Exoplanets, -moons, -comets, Impact events, Status Report

Atmospheric Loss During Giant Impacts: Mechanisms And Scaling Of Near- And Far-field Loss

by Keith CowingMay 14, 2025May 14, 2025

The primary epoch of planetary accretion concludes with giant impacts – highly energetic collisions between proto-planets that can play a key role in shaping a planet’s inventory of volatile elements. […]

ejecta plume

Atmospheric Loss During Giant Impacts: Mechanisms And Scaling Of Near- And Far-field Loss

Material Cycling Across Earth’s Spheres And Triggers Of Cambrian Explosion: A Tectonic Perspective

Where Does Earth’s Nitrogen Go? Two Atoms Offer A Clue

Exotic Methanol Discovered In Planet-Building Zones

More Than One Thousand TESS Planets

First Detection Of Variable Water Clouds Outside Of Our Solar System